- P_outThe postprocessor (or scalar) that provides the absolute outlet pressure [Pa]. The solved pressure variable P is relative to this value.
C++ Type:PostprocessorName
Unit:(no unit assumed)
Controllable:No
Description:The postprocessor (or scalar) that provides the absolute outlet pressure [Pa]. The solved pressure variable P is relative to this value.
- compute_densityFalseFlag that enables the calculation of density
Default:False
C++ Type:bool
Controllable:No
Description:Flag that enables the calculation of density
- compute_powerFalseFlag that informs whether we solve the Enthalpy/Temperature equations or not
Default:False
C++ Type:bool
Controllable:No
Description:Flag that informs whether we solve the Enthalpy/Temperature equations or not
- compute_viscosityFalseFlag that enables the calculation of viscosity
Default:False
C++ Type:bool
Controllable:No
Description:Flag that enables the calculation of viscosity
- fpFluid properties user object name
C++ Type:UserObjectName
Controllable:No
Description:Fluid properties user object name
- friction_closureClosure computing the friction factor
C++ Type:UserObjectName
Controllable:No
Description:Closure computing the friction factor
- mixing_closureClosure computing the turbulent mixing, wire-induced mixing and sweep flow mixing parameter where applicable
C++ Type:UserObjectName
Controllable:No
Description:Closure computing the turbulent mixing, wire-induced mixing and sweep flow mixing parameter where applicable
- n_blocksThe number of blocks in the axial direction
C++ Type:unsigned int
Controllable:No
Description:The number of blocks in the axial direction
TriSubChannel1PhaseProblem
Solver class for subchannels in a triangular lattice assembly and bare/wire-wrapped fuel pins
Overview
This class solves for the subchannel flow variables in the case of subchannels/pins arranged in a triangular lattice. It inherits from the base class : SubChannel1PhaseProblem. Information regarding the solver can be found in SubChannel Theory.
Pin surface temperature is calculated at the end of the solve using a user-selected correlation.
Channel-to-Pin and Channel-to-Duct Heat Transfer Modeling
The pin surface temperature are computed via the convective heat transfer coefficient as follows:
where:
is the surface temperature for the pin at a height
is the number of subchannels neighboring the pin
is the bulk temperature for a subchannel neighboring the pin at a height
is the linear heat generation rate for the pin at a height
is the pin diameter at a height
is the convective heat transfer coefficient for the subchannel next to the duct node at a height
For the duct, the duct surface temperature is defined as follows:
where:
is the duct surface temperature at a height
is the bulk temperature of the subchannel next to the duct node
is the heat flux at the duct at a height
is the convective heat transfer coefficientfor the subchannel next to the duct node at a height
In both cases, the convective heat transfer coefficients are computed using the Nusselt number (Nu) as follows:
where:
is the local thermal conductivity of the fluid in the subchannel neighboring the structure
is the hydraulics diameter of the subchannel neighboring the structure
The modeling of the Nusselt number and consequently of the convective heat transfer coefficient h is selected by the user through a closure. The closure models available to the user that are implemented in SCM are the following:
Dittus-Boelter (recommended for water coolant)
Modified Gnielinski (recommended for duct surface)
Kazimi-Carelli (applicable to liquid metals)
Schad-Modified (applicable to liquid metals)
Graber-Rieger (applicable to liquid metals)
Borishanskii (applicable to liquid metals)
All these models inherit from the base class: SCMHTCClosureBase. A synopsis of the closure models availabe in SCM with the range of validity, is presented in Table HTC models.
commentnote
Currently there is no subchannel-to-duct heat transfer model implemented for square assemblies (square ducts). It only exists for hexagonal assemblies (hexagonal ducts). The subchannel-to-pin model is available for both hexagonal and square assemblies.
Example Input File Syntax
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = LEAD
n_blocks = 1
P_out = 1.0e5
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-4
implicit = true
segregated = false
staggered_pressure = false
verbose_multiapps = true
verbose_subchannel = true
interpolation_scheme = upwind
friction_closure = 'cheng'
full_output = true
mixing_closure = 'Kim_and_Chung'
[]Input Parameters
- P_tol1e-06Pressure tolerance
Default:1e-06
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Pressure tolerance
- T_maxit100Maximum number of iterations for inner temperature loop
Default:100
C++ Type:int
Controllable:No
Description:Maximum number of iterations for inner temperature loop
- T_tol1e-06Temperature tolerance
Default:1e-06
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Temperature tolerance
- atol1e-06Absolute tolerance for ksp solver
Default:1e-06
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Absolute tolerance for ksp solver
- blockANY_BLOCK_ID List of subdomains for kernel coverage and material coverage checks. Setting this parameter is equivalent to setting 'kernel_coverage_block_list' and 'material_coverage_block_list' as well as using 'ONLY_LIST' as the coverage check mode.
Default:ANY_BLOCK_ID
C++ Type:std::vector<SubdomainName>
Controllable:No
Description:List of subdomains for kernel coverage and material coverage checks. Setting this parameter is equivalent to setting 'kernel_coverage_block_list' and 'material_coverage_block_list' as well as using 'ONLY_LIST' as the coverage check mode.
- dtol100000Divergence tolerance or ksp solver
Default:100000
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Divergence tolerance or ksp solver
- duct_HTC_closureClosure computing HTC on duct (required if duct mesh exists).
C++ Type:UserObjectName
Controllable:No
Description:Closure computing HTC on duct (required if duct mesh exists).
- full_outputFalseFlag that enables the output of the maximum number of variables.
Default:False
C++ Type:bool
Controllable:No
Description:Flag that enables the output of the maximum number of variables.
- gravitycounter_flowDirection of gravity. Default is counter_flow
Default:counter_flow
C++ Type:MooseEnum
Options:counter_flow, co_flow, none
Controllable:No
Description:Direction of gravity. Default is counter_flow
- implicitFalseBoolean to define the use of explicit or implicit solution.
Default:False
C++ Type:bool
Controllable:No
Description:Boolean to define the use of explicit or implicit solution.
- interpolation_schemecentral_differenceInterpolation scheme used for the method. Default is central_difference
Default:central_difference
C++ Type:MooseEnum
Options:upwind, downwind, central_difference, exponential
Controllable:No
Description:Interpolation scheme used for the method. Default is central_difference
- linear_sys_namesThe linear system names
C++ Type:std::vector<LinearSystemName>
Controllable:No
Description:The linear system names
- maxit10000Maximum number of iterations for ksp solver
Default:10000
C++ Type:long
Controllable:No
Description:Maximum number of iterations for ksp solver
- pin_HTC_closureClosure computing HTC on fuel pin (required if pin mesh exists).
C++ Type:UserObjectName
Controllable:No
Description:Closure computing HTC on fuel pin (required if pin mesh exists).
- regard_general_exceptions_as_errorsFalseIf we catch an exception during residual/Jacobian evaluaton for which we don't have specific handling, immediately error instead of allowing the time step to be cut
Default:False
C++ Type:bool
Controllable:No
Description:If we catch an exception during residual/Jacobian evaluaton for which we don't have specific handling, immediately error instead of allowing the time step to be cut
- rtol1e-06Relative tolerance for ksp solver
Default:1e-06
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Relative tolerance for ksp solver
- segregatedTrueBoolean to define whether to use a segregated solution.
Default:True
C++ Type:bool
Controllable:No
Description:Boolean to define whether to use a segregated solution.
- solveTrueWhether or not to actually solve the Nonlinear system. This is handy in the case that all you want to do is execute AuxKernels, Transfers, etc. without actually solving anything
Default:True
C++ Type:bool
Controllable:Yes
Description:Whether or not to actually solve the Nonlinear system. This is handy in the case that all you want to do is execute AuxKernels, Transfers, etc. without actually solving anything
- staggered_pressureFalseBoolean to define the use of staggered or collocated pressure.
Default:False
C++ Type:bool
Controllable:No
Description:Boolean to define the use of staggered or collocated pressure.
- verbose_subchannelFalseBoolean to print out information related to subchannel solve.
Default:False
C++ Type:bool
Controllable:No
Description:Boolean to print out information related to subchannel solve.
Optional Parameters
- allow_initial_conditions_with_restartFalseTrue to allow the user to specify initial conditions when restarting. Initial conditions can override any restarted field
Default:False
C++ Type:bool
Controllable:No
Description:True to allow the user to specify initial conditions when restarting. Initial conditions can override any restarted field
- force_restartFalseEXPERIMENTAL: If true, a sub_app may use a restart file instead of using of using the master backup file
Default:False
C++ Type:bool
Controllable:No
Description:EXPERIMENTAL: If true, a sub_app may use a restart file instead of using of using the master backup file
- restart_file_baseFile base name used for restart (e.g.
/ or /LATEST to grab the latest file available) C++ Type:FileNameNoExtension
Controllable:No
Description:File base name used for restart (e.g.
/ or /LATEST to grab the latest file available)
Restart Parameters
- allow_invalid_solutionFalseSet to true to allow convergence even though the solution has been marked as 'invalid'
Default:False
C++ Type:bool
Controllable:No
Description:Set to true to allow convergence even though the solution has been marked as 'invalid'
- immediately_print_invalid_solutionFalseWhether or not to report invalid solution warnings at the time the warning is produced instead of after the calculation
Default:False
C++ Type:bool
Controllable:No
Description:Whether or not to report invalid solution warnings at the time the warning is produced instead of after the calculation
- show_invalid_solution_consoleTrueSet to true to show the invalid solution occurrence summary in console
Default:True
C++ Type:bool
Controllable:No
Description:Set to true to show the invalid solution occurrence summary in console
Solution Validity Control Parameters
- boundary_restricted_elem_integrity_checkTrueSet to false to disable checking of boundary restricted elemental object variable dependencies, e.g. are the variable dependencies defined on the selected boundaries?
Default:True
C++ Type:bool
Controllable:No
Description:Set to false to disable checking of boundary restricted elemental object variable dependencies, e.g. are the variable dependencies defined on the selected boundaries?
- boundary_restricted_node_integrity_checkTrueSet to false to disable checking of boundary restricted nodal object variable dependencies, e.g. are the variable dependencies defined on the selected boundaries?
Default:True
C++ Type:bool
Controllable:No
Description:Set to false to disable checking of boundary restricted nodal object variable dependencies, e.g. are the variable dependencies defined on the selected boundaries?
- check_uo_aux_stateFalseTrue to turn on a check that no state presents during the evaluation of user objects and aux kernels
Default:False
C++ Type:bool
Controllable:No
Description:True to turn on a check that no state presents during the evaluation of user objects and aux kernels
- error_on_jacobian_nonzero_reallocationFalseThis causes PETSc to error if it had to reallocate memory in the Jacobian matrix due to not having enough nonzeros
Default:False
C++ Type:bool
Controllable:No
Description:This causes PETSc to error if it had to reallocate memory in the Jacobian matrix due to not having enough nonzeros
- fv_bcs_integrity_checkTrueSet to false to disable checking of overlapping Dirichlet and Flux BCs and/or multiple DirichletBCs per sideset
Default:True
C++ Type:bool
Controllable:No
Description:Set to false to disable checking of overlapping Dirichlet and Flux BCs and/or multiple DirichletBCs per sideset
- kernel_coverage_block_listList of subdomains for kernel coverage check. The meaning of this list is controlled by the parameter 'kernel_coverage_check' (whether this is the list of subdomains to be checked, not to be checked or not taken into account).
C++ Type:std::vector<SubdomainName>
Controllable:No
Description:List of subdomains for kernel coverage check. The meaning of this list is controlled by the parameter 'kernel_coverage_check' (whether this is the list of subdomains to be checked, not to be checked or not taken into account).
- material_coverage_block_listList of subdomains for material coverage check. The meaning of this list is controlled by the parameter 'material_coverage_check' (whether this is the list of subdomains to be checked, not to be checked or not taken into account).
C++ Type:std::vector<SubdomainName>
Controllable:No
Description:List of subdomains for material coverage check. The meaning of this list is controlled by the parameter 'material_coverage_check' (whether this is the list of subdomains to be checked, not to be checked or not taken into account).
- material_coverage_checkTRUEControls, if and how a material subdomain coverage check is performed. With 'TRUE' or 'ON' all subdomains are checked (the default). Setting 'FALSE' or 'OFF' will disable the check for all subdomains. To exclude a predefined set of subdomains 'SKIP_LIST' is to be used, while the subdomains to skip are to be defined in the parameter 'material_coverage_block_list'. To limit the check to a list of subdomains, 'ONLY_LIST' is to be used (again, using the parameter 'material_coverage_block_list').
Default:TRUE
C++ Type:MooseEnum
Options:FALSE, TRUE, OFF, ON, SKIP_LIST, ONLY_LIST
Controllable:No
Description:Controls, if and how a material subdomain coverage check is performed. With 'TRUE' or 'ON' all subdomains are checked (the default). Setting 'FALSE' or 'OFF' will disable the check for all subdomains. To exclude a predefined set of subdomains 'SKIP_LIST' is to be used, while the subdomains to skip are to be defined in the parameter 'material_coverage_block_list'. To limit the check to a list of subdomains, 'ONLY_LIST' is to be used (again, using the parameter 'material_coverage_block_list').
- material_dependency_checkTrueSet to false to disable material dependency check
Default:True
C++ Type:bool
Controllable:No
Description:Set to false to disable material dependency check
Simulation Checks Parameters
- control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
Controllable:No
Description:Adds user-defined labels for accessing object parameters via control logic.
- default_ghostingFalseWhether or not to use libMesh's default amount of algebraic and geometric ghosting
Default:False
C++ Type:bool
Controllable:No
Description:Whether or not to use libMesh's default amount of algebraic and geometric ghosting
- enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Controllable:No
Description:Set the enabled status of the MooseObject.
Advanced Parameters
- extra_tag_matricesExtra matrices to add to the system that can be filled by objects which compute residuals and Jacobians (Kernels, BCs, etc.) by setting tags on them. The outer index is for which nonlinear system the extra tag vectors should be added for
C++ Type:std::vector<std::vector<TagName>>
Controllable:No
Description:Extra matrices to add to the system that can be filled by objects which compute residuals and Jacobians (Kernels, BCs, etc.) by setting tags on them. The outer index is for which nonlinear system the extra tag vectors should be added for
- extra_tag_solutionsExtra solution vectors to add to the system that can be used by objects for coupling variable values stored in them.
C++ Type:std::vector<TagName>
Controllable:No
Description:Extra solution vectors to add to the system that can be used by objects for coupling variable values stored in them.
- extra_tag_vectorsExtra vectors to add to the system that can be filled by objects which compute residuals and Jacobians (Kernels, BCs, etc.) by setting tags on them. The outer index is for which nonlinear system the extra tag vectors should be added for
C++ Type:std::vector<std::vector<TagName>>
Controllable:No
Description:Extra vectors to add to the system that can be filled by objects which compute residuals and Jacobians (Kernels, BCs, etc.) by setting tags on them. The outer index is for which nonlinear system the extra tag vectors should be added for
- not_zeroed_tag_vectorsExtra vector tags which the sytem will not zero when other vector tags are zeroed. The outer index is for which nonlinear system the extra tag vectors should be added for
C++ Type:std::vector<std::vector<TagName>>
Controllable:No
Description:Extra vector tags which the sytem will not zero when other vector tags are zeroed. The outer index is for which nonlinear system the extra tag vectors should be added for
Contribution To Tagged Field Data Parameters
- identify_variable_groups_in_nlTrueWhether to identify variable groups in nonlinear systems. This affects dof ordering
Default:True
C++ Type:bool
Controllable:No
Description:Whether to identify variable groups in nonlinear systems. This affects dof ordering
- restore_original_nonzero_patternFalseWhether we should reset matrix memory for every Jacobian evaluation. This option is useful if the sparsity pattern is constantly changing and you are using hash table assembly or if you wish to continually restore the matrix to the originally preallocated sparsity pattern computed by relationship managers.
Default:False
C++ Type:bool
Controllable:No
Description:Whether we should reset matrix memory for every Jacobian evaluation. This option is useful if the sparsity pattern is constantly changing and you are using hash table assembly or if you wish to continually restore the matrix to the originally preallocated sparsity pattern computed by relationship managers.
- use_hash_table_matrix_assemblyFalseWhether to assemble matrices using hash tables instead of preallocating matrix memory. This can be a good option if the sparsity pattern changes throughout the course of the simulation.
Default:False
C++ Type:bool
Controllable:No
Description:Whether to assemble matrices using hash tables instead of preallocating matrix memory. This can be a good option if the sparsity pattern changes throughout the course of the simulation.
Nonlinear System(S) Parameters
- near_null_space_dimension0The dimension of the near nullspace
Default:0
C++ Type:unsigned int
Controllable:No
Description:The dimension of the near nullspace
- null_space_dimension0The dimension of the nullspace
Default:0
C++ Type:unsigned int
Controllable:No
Description:The dimension of the nullspace
- transpose_null_space_dimension0The dimension of the transpose nullspace
Default:0
C++ Type:unsigned int
Controllable:No
Description:The dimension of the transpose nullspace
Null Space Removal Parameters
- parallel_barrier_messagingFalseDisplays messaging from parallel barrier notifications when executing or transferring to/from Multiapps (default: false)
Default:False
C++ Type:bool
Controllable:No
Description:Displays messaging from parallel barrier notifications when executing or transferring to/from Multiapps (default: false)
- verbose_multiappsFalseSet to True to enable verbose screen printing related to MultiApps
Default:False
C++ Type:bool
Controllable:No
Description:Set to True to enable verbose screen printing related to MultiApps
- verbose_restoreFalseSet to True to enable verbose screen printing related to solution restoration
Default:False
C++ Type:bool
Controllable:No
Description:Set to True to enable verbose screen printing related to solution restoration
- verbose_setupfalseSet to 'true' to have the problem report on any object created. Set to 'extra' to also display all parameters.
Default:false
C++ Type:MooseEnum
Options:false, true, extra
Controllable:No
Description:Set to 'true' to have the problem report on any object created. Set to 'extra' to also display all parameters.
Verbosity Parameters
Input Files
- (modules/subchannel/test/tests/SCMTriPower/test.i)
- (modules/subchannel/test/tests/SCMTriPower/test_with_pins.i)
- (modules/subchannel/test/tests/multiapp/sc_core.i)
- (modules/subchannel/validation/Blockage/THORS/FFM-3A.i)
- (modules/subchannel/validation/areva_FCTF/FCTF_non_deformed.i)
- (modules/subchannel/validation/EBR-II/XX09_SCM_SS45R_corrected.i)
- (modules/subchannel/validation/Blockage/THORS/FFM-5B_low.i)
- (modules/subchannel/validation/Blockage/THORS/FFM-5B_high.i)
- (modules/subchannel/test/tests/problems/SFR/sodium-19pin/test19_monolithic.i)
- (modules/subchannel/test/tests/positions/pin_positions.i)
- (modules/subchannel/test/tests/problems/deformation/tri_pin_diameter.i)
- (modules/subchannel/test/tests/problems/Lead-LBE-19pin/test_LBE-19pin.i)
- (modules/subchannel/test/tests/problems/Lead-LBE-19pin/test_LEAD-19pin.i)
- (modules/subchannel/validation/EBR-II/XX09_SCM_TR17.i)
- (modules/subchannel/validation/Toshiba_37_pin/toshiba_37_pin.i)
- (modules/subchannel/test/tests/problems/SFR/sodium-19pin/test19_implicit.i)
- (modules/subchannel/validation/ORNL_19_pin/test_ORNL_19.i)
- (modules/subchannel/validation/EBR-II/XX09_SCM_TR45R.i)
- (modules/subchannel/test/tests/problems/SFR/sodium-19pin/test19_explicit.i)
- (modules/subchannel/examples/duct/test.i)
- (modules/subchannel/test/tests/problems/SFR/EBR-II/XX09_SS_SHRT17.i)
- (modules/subchannel/validation/EBR-II/XX09_SCM_SS17_corrected.i)
- (modules/subchannel/examples/MultiApp/fuel_assembly.i)
- (modules/combined/test/tests/subchannel_thm_coupling/subchannel.i)
- (modules/subchannel/validation/areva_FCTF/FCTF_deformed.i)
- (modules/subchannel/validation/EBR-II/XX09_SCM_SS45R.i)
- (modules/subchannel/test/tests/problems/heat_transfer_correlations/XX09_SCM_SS17.i)
- (modules/subchannel/validation/EBR-II/XX09_SCM_SS17.i)
(modules/subchannel/test/tests/problems/Lead-LBE-19pin/test_LEAD-19pin.i)
T_in = 673.15
flow_area = 0.00128171 #m2
rho_in = 10453.21705
# [10 m^3/hour] turns into kg/m^2-sec
mass_flux_in = '${fparse 10*rho_in/3600/flow_area}'
P_out = 1.0e5 # Pa
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = 3
n_cells = 50
flat_to_flat = 0.05319936
heated_length = 0.87
unheated_length_entry = 0.0
unheated_length_exit = 0.402
pin_diameter = 8.2e-3
pitch = 0.01148
dwire = 0.0
hwire = 0.0
spacer_z = '0.177 0.547 0.870'
spacer_k = '1.1719 1.1719 1.1719'
[]
[]
[FluidProperties]
[LEAD]
type = LeadFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = LEAD
n_blocks = 1
P_out = 1.0e5
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-4
implicit = true
segregated = false
staggered_pressure = false
verbose_multiapps = true
verbose_subchannel = true
interpolation_scheme = upwind
friction_closure = 'cheng'
full_output = true
mixing_closure = 'Kim_and_Chung'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[Kim_and_Chung]
type = SCMMixingKimAndChung
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = '${fparse 250000}'
filename = "pin_power_profile19.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = LEAD
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = LEAD
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = LEAD
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
csv = true
[]
[Postprocessors]
[T1]
type = SubChannelPointValue
variable = T
index = 37
execute_on = "timestep_end"
height = 0.87
[]
[T2]
type = SubChannelPointValue
variable = T
index = 36
execute_on = "timestep_end"
height = 0.87
[]
[T3]
type = SubChannelPointValue
variable = T
index = 20
execute_on = "timestep_end"
height = 0.87
[]
[T4]
type = SubChannelPointValue
variable = T
index = 10
execute_on = "timestep_end"
height = 0.87
[]
[T5]
type = SubChannelPointValue
variable = T
index = 4
execute_on = "timestep_end"
height = 0.87
[]
[T6]
type = SubChannelPointValue
variable = T
index = 1
execute_on = "timestep_end"
height = 0.87
[]
[T7]
type = SubChannelPointValue
variable = T
index = 14
execute_on = "timestep_end"
height = 0.87
[]
[T8]
type = SubChannelPointValue
variable = T
index = 28
execute_on = "timestep_end"
height = 0.87
[]
####### Assembly pressure drop
[DP_SubchannelDelta]
type = SubChannelDelta
variable = P
execute_on = 'TIMESTEP_END'
[]
#####
[Mean_Temp]
type = SCMPlanarMean
variable = T
height = 2
[]
[Total_power]
type = ElementIntegralVariablePostprocessor
variable = q_prime
[]
[]
[Executioner]
type = Steady
[]
# ################################################################################
# # A multiapp that projects data to a detailed mesh
# ################################################################################
# [MultiApps]
# [viz]
# type = FullSolveMultiApp
# input_files = "3d_LBE_19.i"
# execute_on = "timestep_end"
# max_procs_per_app = 1
# []
# []
# [Transfers]
# [xfer]
# type = SCMSolutionTransfer
# to_multi_app = viz
# variable = 'mdot SumWij P DP h T rho mu q_prime S'
# []
# []
(modules/subchannel/test/tests/SCMTriPower/test.i)
T_in = 588.5
flow_area = 0.0004980799633447909 #m2
mass_flux_in = '${fparse 55*3.78541/10/60/flow_area}'
P_out = 2.0e5 # Pa
length = 0.5
num_cells = 40
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = 3
n_cells = ${num_cells}
flat_to_flat = 3.41e-2
heated_length = 0.5
unheated_length_entry = 0.4
unheated_length_exit = 0.1
pin_diameter = 5.84e-3
pitch = 7.26e-3
dwire = 1.42e-3
hwire = 0.3048
[]
[]
[AuxVariables]
[q_prime_aux]
[]
[]
[Functions]
[axial_heat_rate]
type = ParsedFunction
expression = '(pi/2)*sin(pi*z/L)'
symbol_names = 'L'
symbol_values = '${length}'
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = 2.0e5
compute_density = true
compute_viscosity = true
compute_power = true
implicit = true
segregated = false
verbose_subchannel = true
interpolation_scheme = upwind
pin_HTC_closure = 'gnielinski'
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[q_prime_ic]
type = SCMTriPowerIC
variable = q_prime
power = 20000 # W
filename = "pin_power_profile.txt"
# axial_heat_rate = axial_heat_rate
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[q_prime_AUX]
type = SCMTriPowerAux
variable = q_prime_aux
power = 20000 # W
filename = "pin_power_profile.txt" #type in name of file that describes radial power profile
# axial_heat_rate = axial_heat_rate
execute_on = 'initial'
[]
[]
[Executioner]
type = Steady
[]
[Postprocessors]
[Total_power_IC_defaultPP]
type = ElementIntegralVariablePostprocessor
variable = q_prime
[]
[Total_power_Aux_defaultPP]
type = ElementIntegralVariablePostprocessor
variable = q_prime_aux
[]
[Total_power_SCMPinPowerPostprocessor]
type = SCMPinPowerPostprocessor
[]
[Total_power_SCMTHPowerPostprocessor]
type = SCMTHPowerPostprocessor
[]
[]
[Outputs]
csv = true
[]
(modules/subchannel/test/tests/SCMTriPower/test_with_pins.i)
T_in = 588.5
flow_area = 0.0004980799633447909 #m2
mass_flux_in = '${fparse 55*3.78541/10/60/flow_area}'
P_out = 2.0e5 # Pa
length = 0.5
num_cells = 40
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = 3
n_cells = ${num_cells}
flat_to_flat = 3.41e-2
heated_length = 0.5
unheated_length_entry = 0.4
unheated_length_exit = 0.1
pin_diameter = 5.84e-3
pitch = 7.26e-3
dwire = 1.42e-3
hwire = 0.3048
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = 3
n_cells = ${num_cells}
heated_length = 0.5
unheated_length_entry = 0.4
unheated_length_exit = 0.1
pitch = 7.26e-3
[]
[]
[AuxVariables]
[q_prime_aux]
block = fuel_pins
[]
[]
[Functions]
[axial_heat_rate]
type = ParsedFunction
expression = '(pi/2)*sin(pi*z/L)'
symbol_names = 'L'
symbol_values = '${length}'
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = 2.0e5
compute_density = true
compute_viscosity = true
compute_power = true
implicit = true
segregated = false
verbose_subchannel = true
interpolation_scheme = upwind
pin_HTC_closure = 'gnielinski'
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[q_prime_ic]
type = SCMTriPowerIC
variable = q_prime
power = 20000 # W
filename = "pin_power_profile.txt"
axial_heat_rate = axial_heat_rate
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[q_prime_AUX]
type = SCMTriPowerAux
variable = q_prime_aux
power = 20000 # W
filename = "pin_power_profile.txt" #type in name of file that describes radial power profile
axial_heat_rate = axial_heat_rate
execute_on = 'initial'
[]
[]
[Executioner]
type = Steady
[]
[Postprocessors]
[Total_power_IC_defaultPP]
type = ElementIntegralVariablePostprocessor
variable = q_prime
block = fuel_pins
[]
[Total_power_Aux_defaultPP]
type = ElementIntegralVariablePostprocessor
variable = q_prime_aux
block = fuel_pins
[]
[Total_power_SCMPinPowerPostprocessor]
type = SCMPinPowerPostprocessor
[]
[Total_power_SCMTHPowerPostprocessor]
type = SCMTHPowerPostprocessor
[]
[]
[VectorPostprocessors]
[line_check]
type = LineValueSampler
variable = 'q_prime q_prime_aux'
execute_on = 'TIMESTEP_END'
sort_by = 'z'
start_point = '0 0 0'
end_point = '0 0 1.0'
num_points = ${fparse num_cells + 1}
[]
[]
[Outputs]
csv = true
[]
(modules/subchannel/test/tests/multiapp/sc_core.i)
# Following Advanced Burner Test Reactor Preconceptual Design Report
# Vailable at: https://www.ne.anl.gov/eda/ABTR_1cv2_ws.pdf
###################################################
# Thermal-hydraulics parameters
###################################################
T_in = 866.0
P_out = 253727.1 # Pa
reactor_power = 671337.24 #WTh
mass_flow = '${fparse 6.15}' # kg/(s)
###################################################
# Geometric parameters
###################################################
# units are cm - do not forget to convert to meter
scale_factor = 0.01
fuel_pin_pitch = '${fparse 1.4478*scale_factor}'
fuel_pin_diameter = '${fparse 1.4268*scale_factor}'
wire_z_spacing = '${fparse 0*scale_factor}'
wire_diameter = '${fparse 0*scale_factor}'
n_rings = 8
length_heated_fuel = '${fparse 35.56*scale_factor}'
entry_length = 0
duct_inside = '${fparse 11.43*2*scale_factor}'
###################################################
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = '${fparse n_rings}'
n_cells = 10
flat_to_flat = '${fparse duct_inside}'
heated_length = '${fparse length_heated_fuel}'
pin_diameter = '${fparse fuel_pin_diameter}'
pitch = '${fparse fuel_pin_pitch}'
dwire = '${fparse wire_diameter}'
hwire = '${fparse wire_z_spacing}'
spacer_z = '0'
spacer_k = '0'
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = '${fparse n_rings}'
n_cells = 10
heated_length = '${fparse length_heated_fuel}'
pitch = '${fparse fuel_pin_pitch}'
[]
[duct]
type = SCMTriDuctMeshGenerator
input = fuel_pins
nrings = '${fparse n_rings}'
n_cells = 10
flat_to_flat = '${fparse duct_inside}'
heated_length = '${fparse length_heated_fuel}'
pitch = '${fparse fuel_pin_pitch}'
[]
[]
# All needed aux variables are automatically loaded if [SubChannel] block exists
# [AuxVariables]
# [mdot]
# block = subchannel
# []
# [SumWij]
# block = subchannel
# []
# [P]
# block = subchannel
# []
# [DP]
# block = subchannel
# []
# [h]
# block = subchannel
# []
# [T]
# block = subchannel
# []
# [Tpin]
# block = fuel_pins
# []
# [Dpin]
# block = fuel_pins
# []
# [rho]
# block = subchannel
# []
# [S]
# block = subchannel
# []
# [w_perim]
# block = subchannel
# []
# [q_prime]
# block = fuel_pins
# []
# [mu]
# block = subchannel
# []
# [q_prime_duct]
# block = duct
# initial_condition = 0
# []
# [Tduct]
# block = duct
# []
# [displacement]
# block = subchannel
# initial_condition = 0
# []
# []
[FluidProperties]
[sodium]
type = SimpleFluidProperties
molar_mass = 0.0355
cp = 873.0
cv = 873.0
specific_entropy = 1055
viscosity = 0.0001582
thermal_conductivity = 25.9
thermal_expansion = 2.77e-4
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = ${P_out}
P_tol = 1.0e-2
T_tol = 1.0e-2
# Solver settings
implicit = true
segregated = false
# Output
verbose_multiapps = true
verbose_subchannel = true
compute_density = false
compute_viscosity = false
compute_power = false
# Heat Transfer Correlations
pin_HTC_closure = 'gnielinski'
duct_HTC_closure = 'gnielinski'
# Friction Correlation
friction_closure = 'Cheng'
full_output = true
# Mixing Correlation
mixing_closure = 'Kim'
[]
[SCMClosures]
[Cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[Kim]
type = SCMMixingKimAndChung
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = ${reactor_power} # W
filename = 'pin_p.txt'
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[T_duct_ic]
type = ConstantIC
variable = Tduct
value = ${T_in}
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
block = sub_channel
[]
[mdot_in_bc]
type = SCMFlatMassFlowRateAux
variable = mdot
boundary = inlet
mass_flow = ${mass_flow}
execute_on = 'timestep_begin'
block = sub_channel
[]
[]
[Executioner]
type = Steady
[]
[VectorPostprocessors]
[sub]
type = LineValueSampler
start_point = '0 -0.00835888 ${entry_length}'
end_point = '0 -0.00835888 ${fparse entry_length + length_heated_fuel}'
num_points = 10
variable = 'h rho P'
sort_by = 'z'
execute_on = 'timestep_end'
[]
[]
[Outputs]
csv = true
[]
(modules/subchannel/validation/Blockage/THORS/FFM-3A.i)
################################################################################
## THORS bundle 3A central blockage benchmark ##
## SCM simulation ##
## POC : Vasileios Kyriakopoulos, [email protected] ##
################################################################################
# Details on the experimental facility modeled can be found at:
# Han, J. T. "Blockages in LMFBR fuel assemblies: A review of experimental and theoretical studies." (1977).
# The affected subchannels get an area reduction and a form loss coefficient
T_in = 714.261
A12 = 1.00423e3
A13 = -0.21390
A14 = -1.1046e-5
rho = '${fparse A12 + A13 * T_in + A14 * T_in * T_in}'
Total_surface_area = 0.000452826 #m2
Blocked_surface_area = 0.0 #m2
Flow_area = '${fparse Total_surface_area - Blocked_surface_area}'
vol_flow = 3.4E-03 #m3/s
mass_flux_in = '${fparse rho * vol_flow / Flow_area}'
P_out = 2.0e5 # Pa
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = 3
n_cells = 36
flat_to_flat = 0.0338514
heated_length = 0.5334
unheated_length_entry = 0.3048
unheated_length_exit = 0.0762
pin_diameter = 0.005842
pitch = 7.2644e-3
dwire = 0.0014224
hwire = 0.3048
spacer_z = '0.0'
spacer_k = '0.0'
z_blockage = '0.6858 0.69215'
index_blockage = '0 1 2 3 4 5'
reduction_blockage = '0.08 0.08 0.08 0.08 0.08 0.08'
k_blockage = '2.0 2.0 2.0 2.0 2.0 2.0'
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = 2.0e5
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-4
implicit = true
segregated = false
verbose_subchannel = true
interpolation_scheme = exponential
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.0
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = 332500.0 #W
filename = "pin_power_profile_19.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Executioner]
type = Steady
[]
[Postprocessors]
[1]
type = SubChannelPointValue
variable = T
index = 37
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[2]
type = SubChannelPointValue
variable = T
index = 36
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[3]
type = SubChannelPointValue
variable = T
index = 20
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[4]
type = SubChannelPointValue
variable = T
index = 10
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[5]
type = SubChannelPointValue
variable = T
index = 4
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[6]
type = SubChannelPointValue
variable = T
index = 1
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[7]
type = SubChannelPointValue
variable = T
index = 14
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[8]
type = SubChannelPointValue
variable = T
index = 28
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[]
(modules/subchannel/validation/areva_FCTF/FCTF_non_deformed.i)
# Following Benchmark Specifications and Data Requirements for the AREVA heated-bundle test in its Fuel Cooling Test Facility (FCTF)
# as part of a U.S. DOE funded project: Towards a Longer-Life Core. In partnership with TerraPower, TAMU and ANL,
# AREVA NP tested a wire-wrapped pin bundle. The bundle consists of electrically heated pins and non-heated pins.
# This test collected measurements to evaluate thermal hydraulic performance of a wire wrapped bundle, useful for CFD and other software validation.
# Available at: https://www.osti.gov/servlets/purl/1346027/
###################################################
# Steady state subchannel calculation
# Thermal-hydraulics parameters
###################################################
T_in = 305.44 #Kelvin (32.29 C)
# mu = 0.0007646 #Pas
# Re = 20500
# Dh = 0.004535
Total_Surface_Area_SC = 0.00285294 #m2
Total_Surface_Area_EXP = 0.002808 #m2
P_out = 829370.355 # Pa (120.29 psia)
Power = 90640 # Watt Each heater pin had a max power of 30kW
# Heater 17 (18) not working.
# test:19 power = 22613 22610 22754 22663 [W], Total Power = 90640 [W], mdot_average = 9.576 [kg/s], Re = 20300
# Index of heated pins per silicon controled rectifiers (Areva notation):1 3 6 7 || 4 5 11 15 ||2 9 19 40 60 || 13 44 48 52 56 (from bottom to top)
# Index of heated pins per silicon controled rectifiers (SC notation):0 3 6 1 || 4 5 12 16 || 2 10 8 43 39 || 14 47 51 55 59 (from top to bottom) 38 areva->41 SC
# Relative power of pin per rectifier: 1.12266659312 || 1.12251765225 || 0.90373345101 || 0.90011915269
mdot_average = '${fparse 9.33 * Total_Surface_Area_SC / Total_Surface_Area_EXP}'
mass_flux_in = '${fparse mdot_average / Total_Surface_Area_SC}' #kg/m2
###################################################
# Geometric parameters (non-deformed heated bundle)
###################################################
fuel_pin_pitch = 0.01122652 #m
fuel_pin_diameter = 0.009514 #m
wire_z_spacing = 0.285 #m
wire_diameter = 0.0017062 #m
inner_duct_in = 0.092 #m
n_rings = 5
unheated_length_entry = 1.14 #m
heated_length = 1.71 #m
unheated_length_exit = 0.855 #m
###################################################
[TriSubChannelMesh]
[subchannel]
type = SCMTriSubChannelMeshGenerator
nrings = ${n_rings}
n_cells = 65
flat_to_flat = ${inner_duct_in}
unheated_length_entry = ${unheated_length_entry}
heated_length = ${heated_length}
unheated_length_exit = ${unheated_length_exit}
pin_diameter = ${fuel_pin_diameter}
pitch = ${fuel_pin_pitch}
dwire = ${wire_diameter}
hwire = ${wire_z_spacing}
spacer_z = '0.0'
spacer_k = '0.0'
[]
[pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = ${n_rings}
n_cells = 65
unheated_length_entry = ${unheated_length_entry}
heated_length = ${heated_length}
unheated_length_exit = ${unheated_length_exit}
pitch = ${fuel_pin_pitch}
[]
[]
[Functions]
[axial_heat_rate]
type = ParsedFunction
expression = '(0.4*pi/(pi-2))*sin(pi*z/L) + 1.4 - (0.4*pi/(pi-2))'
symbol_names = 'L'
symbol_values = '${heated_length}'
[]
[]
[FluidProperties]
[water]
type = Water97FluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = water
n_blocks = 1
P_out = ${P_out}
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-4
implicit = true
segregated = false
interpolation_scheme = 'upwind'
verbose_subchannel = true
# Heat Transfer Correlations
pin_HTC_closure = 'gnielinski'
# friction model
friction_closure = 'cheng'
full_output = true
# Turbulent mixing Correlation
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = ${Power}
filename = "pin_power_profile61.txt"
axial_heat_rate = axial_heat_rate
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = water
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = water
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = water
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
block = subchannel
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
!include non_deformed_duct_pp.i
[Executioner]
type = Steady
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = '3D.i'
execute_on = 'FINAL'
[]
[]
[Transfers]
[subchannel_transfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu S displacement'
[]
[pin_transfer]
type = SCMPinSolutionTransfer
to_multi_app = viz
variable = 'Dpin Tpin q_prime'
[]
[]
(modules/subchannel/validation/EBR-II/XX09_SCM_SS45R_corrected.i)
# Following Benchmark Specifications and Data Requirements for EBR-II Shutdown Heat Removal Tests SHRT-17 and SHRT-45R
# Available at: https://publications.anl.gov/anlpubs/2012/06/73647.pdf
###################################################
# Steady state subchannel calculation
# Thermal-hydraulics parameters
###################################################
T_in = 616.4 #Kelvin
Total_Surface_Area = 0.000854322 #m2
Mass_In = 2.427 #kg/sec
mass_flux_in = '${fparse Mass_In / Total_Surface_Area}' #kg/m2
P_out = 2.0e5
Power_initial = 379800 #W (Page 26,35 of ANL document)
###################################################
# Geometric parameters
###################################################
scale_factor = 0.01
fuel_pin_pitch = '${fparse 0.5664*scale_factor}'
fuel_pin_diameter = '${fparse 0.4419*scale_factor}'
wire_z_spacing = '${fparse 15.24*scale_factor}'
wire_diameter = '${fparse 0.1244*scale_factor}'
inner_duct_in = '${fparse 4.64*scale_factor}'
n_rings = 5
heated_length = '${fparse 34.3*scale_factor}'
unheated_length_exit = '${fparse 26.9*scale_factor}'
###################################################
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = ${n_rings}
n_cells = 50
flat_to_flat = ${inner_duct_in}
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pin_diameter = ${fuel_pin_diameter}
pitch = ${fuel_pin_pitch}
dwire = ${wire_diameter}
hwire = ${wire_z_spacing}
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = ${n_rings}
n_cells = 50
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[duct]
type = SCMTriDuctMeshGenerator
input = fuel_pins
nrings = ${n_rings}
n_cells = 50
flat_to_flat = ${inner_duct_in}
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[]
[Functions]
[axial_heat_rate]
type = ParsedFunction
expression = '(pi/2)*sin(pi*z/L)*exp(-alpha*z)/(1.0/alpha*(1.0 - exp(-alpha*L)))*L'
symbol_names = 'L alpha'
symbol_values = '${heated_length} 1.8012'
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = ${P_out}
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-5
implicit = true
segregated = false
interpolation_scheme = 'upwind'
verbose_subchannel = true
pin_HTC_closure = 'gnielinski'
duct_HTC_closure = 'gnielinski'
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = ${Power_initial}
filename = "pin_power_profile61.txt"
axial_heat_rate = axial_heat_rate
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
block = sub_channel
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
csv = true
[]
[Postprocessors]
[TTC-27]
type = SubChannelPointValue
variable = T
index = 91
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-28]
type = SubChannelPointValue
variable = T
index = 50
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-29]
type = SubChannelPointValue
variable = T
index = 21
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-30]
type = SubChannelPointValue
variable = T
index = 4
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-31]
type = SubChannelPointValue
variable = T
index = 2
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-32]
type = SubChannelPointValue
variable = T
index = 16
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-33]
type = SubChannelPointValue
variable = T
index = 42
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-34]
type = SubChannelPointValue
variable = T
index = 80
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-35]
type = SubChannelPointValue
variable = T
index = 107
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[MTC-20]
type = SubChannelPointValue
variable = T
index = 33
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-22]
type = SubChannelPointValue
variable = T
index = 3
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-24]
type = SubChannelPointValue
variable = T
index = 28
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-25]
type = SubChannelPointValue
variable = T
index = 60
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-26]
type = SubChannelPointValue
variable = T
index = 106
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[14TC-37]
type = SubChannelPointValue
variable = T
index = 52
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[14TC-39]
type = SubChannelPointValue
variable = T
index = 6
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[14TC-41]
type = SubChannelPointValue
variable = T
index = 40
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[14TC-43]
type = SubChannelPointValue
variable = T
index = 105
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[]
[Executioner]
type = Steady
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = '3d_SCM_SS.i'
execute_on = 'FINAL'
[]
[]
[Transfers]
[subchannel_transfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu S'
[]
[pin_transfer]
type = SCMPinSolutionTransfer
to_multi_app = viz
variable = 'Tpin q_prime'
[]
[]
(modules/subchannel/validation/Blockage/THORS/FFM-5B_low.i)
################################################################################
## THORS bundle 5B partial edge blockage benchmark ##
## SCM simulation, low flow casenn ##
## POC : Vasileios Kyriakopoulos, [email protected] ##
################################################################################
# Details on the experimental facility modeled can be found at:
# Han, J. T. "Blockages in LMFBR fuel assemblies: A review of experimental and theoretical studies." (1977).
# This input file models a block next to the duct of the of the assembly
# 102 mm above the start of the heated section.
# Boundary conditions
T_in = 541.55 #K, low flow case
A12 = 1.00423e3
A13 = -0.21390
A14 = -1.1046e-5
rho = '${fparse A12 + A13 * T_in + A14 * T_in * T_in}'
inlet_vel = 0.48 #m/sec, low flow case
mass_flux_in = '${fparse rho * inlet_vel}'
P_out = 2.0e5 # Pa
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = 3
n_cells = 50
flat_to_flat = 0.0324290
heated_length = 0.4572
unheated_length_entry = 0.4064
unheated_length_exit = 0.1524
pin_diameter = 0.005842
pitch = 7.2644e-3
dwire = 0.0014224
hwire = 0.3048
z_blockage = '0.49 0.52'
index_blockage = '29 31 30 32 34 33 35 15 16 8 17 18 9 19'
reduction_blockage = '0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08'
k_blockage = '4 4 4 4 4 4 4 4 4 4 4 4 4 4 '
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = 2.0e5
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-4
implicit = true
segregated = false
verbose_subchannel = true
interpolation_scheme = exponential
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.0
[]
[]
[ICs]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[q_prime_Aux]
type = SCMTriPowerAux
variable = q_prime
power = 52800 #W, low flow case
filename = "pin_power_profile_19.txt"
execute_on = 'initial timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Postprocessors]
[1]
type = SubChannelPointValue
variable = T
index = 34
execute_on = 'initial timestep_end'
height = 0.94
[]
[2]
type = SubChannelPointValue
variable = T
index = 33
execute_on = 'initial timestep_end'
height = 0.94
[]
[3]
type = SubChannelPointValue
variable = T
index = 18
execute_on = 'initial timestep_end'
height = 0.94
[]
[4]
type = SubChannelPointValue
variable = T
index = 9
execute_on = 'initial timestep_end'
height = 0.94
[]
[5]
type = SubChannelPointValue
variable = T
index = 3
execute_on = 'initial timestep_end'
height = 0.94
[]
[6]
type = SubChannelPointValue
variable = T
index = 0
execute_on = 'initial timestep_end'
height = 0.94
[]
[7]
type = SubChannelPointValue
variable = T
index = 12
execute_on = 'initial timestep_end'
height = 0.94
[]
[8]
type = SubChannelPointValue
variable = T
index = 25
execute_on = 'initial timestep_end'
height = 0.94
[]
[]
[Executioner]
type = Steady
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = "FFM-5B_viz.i"
execute_on = "timestep_end"
[]
[]
[Transfers]
[xfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu q_prime S w_perim'
[]
[]
(modules/subchannel/validation/Blockage/THORS/FFM-5B_high.i)
################################################################################
## THORS bundle 5B partial edge blockage benchmark ##
## SCM simulation, high flow case ##
## POC : Vasileios Kyriakopoulos, [email protected] ##
################################################################################
# Details on the experimental facility modeled can be found at:
# Han, J. T. "Blockages in LMFBR fuel assemblies: A review of experimental and theoretical studies." (1977).
# This input file models a block next to the duct of the of the assembly
# 102 mm above the start of the heated section.
# Boundary conditions
T_in = 596.75 # K, high flow case
A12 = 1.00423e3
A13 = -0.21390
A14 = -1.1046e-5
rho = '${fparse A12 + A13 * T_in + A14 * T_in * T_in}'
inlet_vel = 6.93 #m/sec, high flow case
mass_flux_in = '${fparse rho * inlet_vel}'
P_out = 2.0e5 # Pa
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = 3
n_cells = 50
flat_to_flat = 0.0324290
heated_length = 0.4572
unheated_length_entry = 0.4064
unheated_length_exit = 0.1524
pin_diameter = 0.005842
pitch = 7.2644e-3
dwire = 0.0014224
hwire = 0.3048
z_blockage = '0.49 0.52'
index_blockage = '29 31 30 32 34 33 35 15 16 8 17 18 9 19'
reduction_blockage = '0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08'
k_blockage = '4 4 4 4 4 4 4 4 4 4 4 4 4 4 '
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = 2.0e5
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-4
implicit = true
segregated = false
verbose_subchannel = true
interpolation_scheme = exponential
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.0
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = 145000 #W, high flow case
filename = "pin_power_profile_19.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Postprocessors]
[1]
type = SubChannelPointValue
variable = T
index = 34
execute_on = 'initial timestep_end'
height = 0.94
[]
[2]
type = SubChannelPointValue
variable = T
index = 33
execute_on = 'initial timestep_end'
height = 0.94
[]
[3]
type = SubChannelPointValue
variable = T
index = 18
execute_on = 'initial timestep_end'
height = 0.94
[]
[4]
type = SubChannelPointValue
variable = T
index = 9
execute_on = 'initial timestep_end'
height = 0.94
[]
[5]
type = SubChannelPointValue
variable = T
index = 3
execute_on = 'initial timestep_end'
height = 0.94
[]
[6]
type = SubChannelPointValue
variable = T
index = 0
execute_on = 'initial timestep_end'
height = 0.94
[]
[7]
type = SubChannelPointValue
variable = T
index = 12
execute_on = 'initial timestep_end'
height = 0.94
[]
[8]
type = SubChannelPointValue
variable = T
index = 25
execute_on = 'initial timestep_end'
height = 0.94
[]
[]
[Executioner]
type = Steady
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = "FFM-5B_viz.i"
execute_on = "timestep_end"
[]
[]
[Transfers]
[xfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu q_prime S w_perim'
[]
[]
(modules/subchannel/test/tests/problems/SFR/sodium-19pin/test19_monolithic.i)
T_in = 660
mass_flux_in = '${fparse 1e+6 * 300.00 / 36000.*0.5}'
P_out = 2.0e5 # Pa
[GlobalParams]
nrings = 3
n_cells = 5
flat_to_flat = 0.056
heated_length = 0.5
pitch = 0.012
[]
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
pin_diameter = 0.01
dwire = 0.002
hwire = 0.0833
spacer_z = '0'
spacer_k = '5.0'
[]
[duct]
type = SCMTriDuctMeshGenerator
input = sub_channel
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = 2.0e5
compute_density = true
compute_viscosity = true
compute_power = true
T_tol = 1.0e-6
P_tol = 1.0e-6
implicit = true
segregated = false
duct_HTC_closure = 'gnielinski'
friction_closure = 'cheng'
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = 1000.0 # W
filename = "pin_power_profile19.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Postprocessors]
[T1]
type = SubChannelPointValue
variable = T
index = 37
execute_on = "timestep_end"
height = 0.5
[]
[T2]
type = SubChannelPointValue
variable = T
index = 36
execute_on = "timestep_end"
height = 0.5
[]
[T3]
type = SubChannelPointValue
variable = T
index = 20
execute_on = "timestep_end"
height = 0.5
[]
[T4]
type = SubChannelPointValue
variable = T
index = 10
execute_on = "timestep_end"
height = 0.5
[]
[T5]
type = SubChannelPointValue
variable = T
index = 4
execute_on = "timestep_end"
height = 0.5
[]
[T6]
type = SubChannelPointValue
variable = T
index = 1
execute_on = "timestep_end"
height = 0.5
[]
[T7]
type = SubChannelPointValue
variable = T
index = 14
execute_on = "timestep_end"
height = 0.5
[]
[T8]
type = SubChannelPointValue
variable = T
index = 28
execute_on = "timestep_end"
height = 0.5
[]
####### Assembly pressure drop
[DP_SubchannelDelta]
type = SubChannelDelta
variable = P
execute_on = 'TIMESTEP_END'
[]
#####
[Mean_Temp]
type = SCMPlanarMean
variable = T
height = 2
[]
[Total_power]
type = ElementIntegralVariablePostprocessor
variable = q_prime
block = sub_channel
[]
[mdot-8]
type = SubChannelPointValue
variable = mdot
index = 28
execute_on = 'TIMESTEP_END'
height = 0.5
[]
[]
[Executioner]
type = Steady
[]
(modules/subchannel/test/tests/positions/pin_positions.i)
###################################################
# Thermal-hydraulics parameters
###################################################
P_out = 758423 # Pa
###################################################
# Geometric parameters
###################################################
n_cells = 50
# units are cm - do not forget to convert to meter
scale_factor = 0.01
fuel_element_pitch = '${fparse 14.598*scale_factor}'
inter_assembly_gap = '${fparse 0.4*scale_factor}'
duct_thickness = '${fparse 0.3*scale_factor}'
fuel_pin_pitch = '${fparse 0.904*scale_factor}'
fuel_pin_diameter = '${fparse 0.8*scale_factor}'
wire_z_spacing = '${fparse 20.32*scale_factor}'
wire_diameter = '${fparse 0.103*scale_factor}'
n_rings = 9
# Reduced height for convenience
length_entry_fuel = '${fparse 20*scale_factor}'
length_heated_fuel = '${fparse 40*scale_factor}'
length_outlet_fuel = '${fparse 20*scale_factor}'
# height = '${fparse length_entry_fuel+length_heated_fuel+length_outlet_fuel}'
orifice_plate_height = '${fparse 5*scale_factor}'
duct_outside = '${fparse fuel_element_pitch - inter_assembly_gap}'
duct_inside = '${fparse duct_outside - 2 * duct_thickness}'
###################################################
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = '${fparse n_rings}'
n_cells = ${n_cells}
flat_to_flat = '${fparse duct_inside}'
unheated_length_entry = '${fparse length_entry_fuel}'
heated_length = '${fparse length_heated_fuel}'
unheated_length_exit = '${fparse length_outlet_fuel}'
pin_diameter = '${fparse fuel_pin_diameter}'
pitch = '${fparse fuel_pin_pitch}'
dwire = '${fparse wire_diameter}'
hwire = '${fparse wire_z_spacing}'
spacer_z = '${fparse orifice_plate_height} ${fparse length_entry_fuel}'
spacer_k = '0.5 0.5'
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = '${fparse n_rings}'
n_cells = ${n_cells}
unheated_length_entry = '${fparse length_entry_fuel}'
heated_length = '${fparse length_heated_fuel}'
unheated_length_exit = '${fparse length_outlet_fuel}'
pitch = '${fparse fuel_pin_pitch}'
[]
[duct]
type = SCMTriDuctMeshGenerator
input = fuel_pins
nrings = '${fparse n_rings}'
n_cells = ${n_cells}
flat_to_flat = '${fparse duct_inside}'
unheated_length_entry = '${fparse length_entry_fuel}'
heated_length = '${fparse length_heated_fuel}'
unheated_length_exit = '${fparse length_outlet_fuel}'
pitch = '${fparse fuel_pin_pitch}'
[]
[]
[AuxVariables]
[mdot]
block = sub_channel
[]
[SumWij]
block = sub_channel
[]
[P]
block = sub_channel
initial_condition = 0
[]
[DP]
block = sub_channel
[]
[h]
block = sub_channel
[]
[T]
block = sub_channel
[]
[Tpin]
block = fuel_pins
[]
[Dpin]
block = fuel_pins
[]
[rho]
block = sub_channel
[]
[S]
block = sub_channel
[]
[w_perim]
block = sub_channel
[]
[displacement]
block = sub_channel
[]
[ff]
block = sub_channel
[]
[HTC]
block = sub_channel
[]
[q_prime]
block = fuel_pins
[]
[mu]
block = sub_channel
[]
[duct_heat_flux]
block = duct
initial_condition = 0
[]
[Tduct]
block = duct
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[Problem]
type = TriSubChannel1PhaseProblem
fp = sodium
P_out = ${P_out}
solve = false
# Solver parameters
n_blocks = 10
implicit = false
segregated = true
staggered_pressure = false
# Tolerances
P_tol = 1.0e-4
T_tol = 1.0e-8
# Output
compute_density = true
compute_viscosity = true
compute_power = true
verbose_multiapps = true
verbose_subchannel = false
# friction model
friction_closure = 'cheng'
# HTC
pin_HTC_closure = Dittus-Boelter
duct_HTC_closure = Dittus-Boelter
# mixing model (beta)
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[Cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[Dittus-Boelter]
type = SCMHTCDittusBoelter
[]
[cheng_todreas]
type = SCMMixingChengTodreas
[]
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[]
[Executioner]
type = Steady
[]
[Positions]
[pin_positions]
type = SCMPinPositions
outputs = json
[]
[]
[Outputs]
json = true
[]
(modules/subchannel/test/tests/problems/deformation/tri_pin_diameter.i)
T_in = 588.5
P_out = 2.0e5
flow_area = 0.0004980799633447909
mass_flux_in = '${fparse 55*3.78541/10/60/flow_area}'
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = 3
n_cells = 5
flat_to_flat = 3.41e-2
heated_length = 0.5
pin_diameter = 5.5e-3
pitch = 7.26e-3
dwire = 1.42e-3
hwire = 0.3048
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = 3
n_cells = 5
heated_length = 0.5
pitch = 7.26e-3
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = ${P_out}
compute_density = true
compute_viscosity = true
compute_power = false
implicit = true
segregated = false
interpolation_scheme = upwind
friction_closure = 'cheng'
mixing_closure = 'cheng_todreas'
pin_HTC_closure = 'gnielinski'
full_output = true
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[Dpin_ic]
type = ConstantIC
variable = Dpin
value = 5.84e-3
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Postprocessors]
[S_deformed]
type = SubChannelPointValue
variable = S
index = 0
height = 0.25
execute_on = 'timestep_end'
[]
[w_perim_deformed]
type = SubChannelPointValue
variable = w_perim
index = 0
height = 0.25
execute_on = 'timestep_end'
[]
[]
[Executioner]
type = Steady
[]
[Outputs]
console = true
csv = true
[]
(modules/subchannel/test/tests/problems/Lead-LBE-19pin/test_LBE-19pin.i)
T_in = 673.15
flow_area = 0.00128171 #m2
rho_in = 10453.21705
# [10 m^3/hour] turns into kg/m^2-sec
mass_flux_in = '${fparse 10*rho_in/3600/flow_area}'
P_out = 1.0e5 # Pa
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = 3
n_cells = 50
flat_to_flat = 0.05319936
heated_length = 0.87
unheated_length_entry = 0.0
unheated_length_exit = 0.402
pin_diameter = 8.2e-3
pitch = 0.01148
dwire = 0.0
hwire = 0.0
spacer_z = '0.177 0.547 0.870'
spacer_k = '1.1719 1.1719 1.1719'
[]
[]
[FluidProperties]
[LBE]
type = LeadBismuthFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = LBE
n_blocks = 1
P_out = 1.0e5
compute_density = true
compute_viscosity = true
compute_power = true
implicit = true
segregated = false
verbose_subchannel = true
interpolation_scheme = upwind
friction_closure = 'cheng'
full_output = true
mixing_closure = 'Kim_and_Chung'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[Kim_and_Chung]
type = SCMMixingKimAndChung
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = '${fparse 250000}'
filename = "pin_power_profile19.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = LBE
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = LBE
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = LBE
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Postprocessors]
[T1]
type = SubChannelPointValue
variable = T
index = 37
execute_on = "timestep_end"
height = 0.87
[]
[T2]
type = SubChannelPointValue
variable = T
index = 36
execute_on = "timestep_end"
height = 0.87
[]
[T3]
type = SubChannelPointValue
variable = T
index = 20
execute_on = "timestep_end"
height = 0.87
[]
[T4]
type = SubChannelPointValue
variable = T
index = 10
execute_on = "timestep_end"
height = 0.87
[]
[T5]
type = SubChannelPointValue
variable = T
index = 4
execute_on = "timestep_end"
height = 0.87
[]
[T6]
type = SubChannelPointValue
variable = T
index = 1
execute_on = "timestep_end"
height = 0.87
[]
[T7]
type = SubChannelPointValue
variable = T
index = 14
execute_on = "timestep_end"
height = 0.87
[]
[T8]
type = SubChannelPointValue
variable = T
index = 28
execute_on = "timestep_end"
height = 0.87
[]
####### Assembly pressure drop
[DP_SubchannelDelta]
type = SubChannelDelta
variable = P
execute_on = 'TIMESTEP_END'
[]
#####
[Mean_Temp]
type = SCMPlanarMean
variable = T
height = 2
[]
[Total_power]
type = ElementIntegralVariablePostprocessor
variable = q_prime
[]
[]
[Outputs]
csv = true
[]
[Executioner]
type = Steady
[]
# ################################################################################
# # A multiapp that projects data to a detailed mesh
# ################################################################################
# [MultiApps]
# [viz]
# type = FullSolveMultiApp
# input_files = "3d_LBE_19.i"
# execute_on = "timestep_end"
# max_procs_per_app = 1
# []
# []
# [Transfers]
# [xfer]
# type = SCMSolutionTransfer
# to_multi_app = viz
# variable = 'mdot SumWij P DP h T rho mu q_prime S'
# []
# []
(modules/subchannel/test/tests/problems/Lead-LBE-19pin/test_LEAD-19pin.i)
T_in = 673.15
flow_area = 0.00128171 #m2
rho_in = 10453.21705
# [10 m^3/hour] turns into kg/m^2-sec
mass_flux_in = '${fparse 10*rho_in/3600/flow_area}'
P_out = 1.0e5 # Pa
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = 3
n_cells = 50
flat_to_flat = 0.05319936
heated_length = 0.87
unheated_length_entry = 0.0
unheated_length_exit = 0.402
pin_diameter = 8.2e-3
pitch = 0.01148
dwire = 0.0
hwire = 0.0
spacer_z = '0.177 0.547 0.870'
spacer_k = '1.1719 1.1719 1.1719'
[]
[]
[FluidProperties]
[LEAD]
type = LeadFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = LEAD
n_blocks = 1
P_out = 1.0e5
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-4
implicit = true
segregated = false
staggered_pressure = false
verbose_multiapps = true
verbose_subchannel = true
interpolation_scheme = upwind
friction_closure = 'cheng'
full_output = true
mixing_closure = 'Kim_and_Chung'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[Kim_and_Chung]
type = SCMMixingKimAndChung
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = '${fparse 250000}'
filename = "pin_power_profile19.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = LEAD
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = LEAD
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = LEAD
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
csv = true
[]
[Postprocessors]
[T1]
type = SubChannelPointValue
variable = T
index = 37
execute_on = "timestep_end"
height = 0.87
[]
[T2]
type = SubChannelPointValue
variable = T
index = 36
execute_on = "timestep_end"
height = 0.87
[]
[T3]
type = SubChannelPointValue
variable = T
index = 20
execute_on = "timestep_end"
height = 0.87
[]
[T4]
type = SubChannelPointValue
variable = T
index = 10
execute_on = "timestep_end"
height = 0.87
[]
[T5]
type = SubChannelPointValue
variable = T
index = 4
execute_on = "timestep_end"
height = 0.87
[]
[T6]
type = SubChannelPointValue
variable = T
index = 1
execute_on = "timestep_end"
height = 0.87
[]
[T7]
type = SubChannelPointValue
variable = T
index = 14
execute_on = "timestep_end"
height = 0.87
[]
[T8]
type = SubChannelPointValue
variable = T
index = 28
execute_on = "timestep_end"
height = 0.87
[]
####### Assembly pressure drop
[DP_SubchannelDelta]
type = SubChannelDelta
variable = P
execute_on = 'TIMESTEP_END'
[]
#####
[Mean_Temp]
type = SCMPlanarMean
variable = T
height = 2
[]
[Total_power]
type = ElementIntegralVariablePostprocessor
variable = q_prime
[]
[]
[Executioner]
type = Steady
[]
# ################################################################################
# # A multiapp that projects data to a detailed mesh
# ################################################################################
# [MultiApps]
# [viz]
# type = FullSolveMultiApp
# input_files = "3d_LBE_19.i"
# execute_on = "timestep_end"
# max_procs_per_app = 1
# []
# []
# [Transfers]
# [xfer]
# type = SCMSolutionTransfer
# to_multi_app = viz
# variable = 'mdot SumWij P DP h T rho mu q_prime S'
# []
# []
(modules/subchannel/validation/EBR-II/XX09_SCM_TR17.i)
# Following Benchmark Specifications and Data Requirements for EBR-II Shutdown Heat Removal Tests SHRT-17 and SHRT-45R
# Available at: https://publications.anl.gov/anlpubs/2012/06/73647.pdf
# Transient subchannel calculation
###################################################
# Thermal-hydraulics parameters
###################################################
T_in = 624.7 #Kelvin
Total_Surface_Area = 0.000854322 #m3
mass_flux_in = '${fparse 2.45 / Total_Surface_Area}'
P_out = 2.0e5
Power_initial = 486200 #W (Page 26,35 of ANL document)
###################################################
# Geometric parameters
###################################################
scale_factor = 0.01
fuel_pin_pitch = '${fparse 0.5664*scale_factor}'
fuel_pin_diameter = '${fparse 0.4419*scale_factor}'
wire_z_spacing = '${fparse 15.24*scale_factor}'
wire_diameter = '${fparse 0.1244*scale_factor}'
inner_duct_in = '${fparse 4.64*scale_factor}'
n_rings = 5
heated_length = '${fparse 34.3*scale_factor}'
unheated_length_exit = '${fparse 26.9*scale_factor}'
###################################################
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = ${n_rings}
n_cells = 50
flat_to_flat = ${inner_duct_in}
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pin_diameter = ${fuel_pin_diameter}
pitch = ${fuel_pin_pitch}
dwire = ${wire_diameter}
hwire = ${wire_z_spacing}
spacer_z = '0.0'
spacer_k = '0.0'
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = ${n_rings}
n_cells = 50
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[AuxVariables]
[q_prime_init]
block = fuel_pins
[]
[power_history_field]
block = fuel_pins
[]
[q_prime]
block = fuel_pins
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = ${P_out}
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-4
implicit = true
segregated = false
interpolation_scheme = 'upwind'
pin_HTC_closure = 'gnielinski'
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime_init
power = ${Power_initial}
filename = "pin_power_profile61_uniform.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[Functions]
[power_func]
type = PiecewiseLinear
data_file = 'power_history_SHRT17.csv'
format = "columns"
scale_factor = 1.0
[]
[mass_flux_in]
type = PiecewiseLinear
data_file = 'massflow_SHRT17.csv'
format = "columns"
scale_factor = '${fparse mass_flux_in / 2.45}'
[]
[time_step_limiting]
type = PiecewiseLinear
xy_data = '0.1 0.1
10.0 10.0'
[]
[]
[Controls]
[mass_flux_ctrl]
type = RealFunctionControl
parameter = 'Postprocessors/mass_flux_PP/value'
function = 'mass_flux_in'
execute_on = 'initial timestep_begin'
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
block = sub_channel
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = mass_flux_PP
execute_on = 'timestep_begin'
[]
[populate_power_history]
type = FunctionAux
variable = power_history_field
function = 'power_func'
execute_on = 'INITIAL TIMESTEP_BEGIN'
[]
[change_q_prime]
type = ParsedAux
variable = q_prime
coupled_variables = 'q_prime_init power_history_field'
expression = 'q_prime_init*power_history_field'
execute_on = 'INITIAL TIMESTEP_BEGIN'
[]
[]
[Outputs]
csv = true
[]
[Postprocessors]
[report_pressure_outlet]
type = Receiver
default = ${P_out}
[]
[TTC-31]
type = SubChannelPointValue
variable = T
index = 0
execute_on = 'initial timestep_end'
height = 0.322
[]
[post_func]
type = ElementIntegralVariablePostprocessor
block = fuel_pins
variable = q_prime
execute_on = 'INITIAL TIMESTEP_BEGIN'
[]
[mass_flux_PP]
type = ConstantPostprocessor
value = ${mass_flux_in}
[]
[mass_flow_PP]
type = ParsedPostprocessor
expression = '${Total_Surface_Area} * mass_flux_PP'
pp_names = 'mass_flux_PP'
[]
[]
[Executioner]
type = Transient
start_time = -1.0
end_time = 900.0
[TimeStepper]
type = IterationAdaptiveDT
dt = 0.1
iteration_window = 5
optimal_iterations = 6
growth_factor = 1.1
cutback_factor = 0.8
timestep_limiting_function = 'time_step_limiting'
[]
dtmax = 20
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = TransientMultiApp
input_files = '3d_SCM_TR.i'
execute_on = 'INITIAL TIMESTEP_END'
catch_up = true
[]
[]
[Transfers]
[subchannel_transfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu S'
[]
[pin_transfer]
type = SCMPinSolutionTransfer
to_multi_app = viz
variable = 'Tpin q_prime'
[]
[]
(modules/subchannel/validation/Toshiba_37_pin/toshiba_37_pin.i)
T_in = 660
# [1e+6 kg/m^2-hour] turns into kg/m^2-sec
mass_flux_in = '${fparse 1e+6 * 37.00 / 36000.*0.5}'
P_out = 2.0e5 # Pa
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = 4
n_cells = 20
flat_to_flat = 0.085
heated_length = 1.0
pin_diameter = 0.01
pitch = 0.012
dwire = 0.002
hwire = 0.0833
spacer_z = '0 0.2 0.4 0.6 0.8'
spacer_k = '0.1 0.1 0.1 0.1 0.10'
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = 2.0e5
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-6
T_tol = 1.0e-3
implicit = true
segregated = false
staggered_pressure = false
verbose_multiapps = true
verbose_subchannel = false
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[cheng_todreas]
type = SCMMixingChengTodreas
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = 1.000e5 # W
filename = "pin_power_profile_37.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Executioner]
type = Steady
[]
[Postprocessors]
[T_Planar_Mean]
type = SCMPlanarMean
variable = T
execute_on = 'TIMESTEP_END'
height = 1.0
[]
[DP_SubchannelDelta]
type = SubChannelDelta
variable = P
execute_on = 'TIMESTEP_END'
[]
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = "toshiba_37_pin_viz.i"
execute_on = "timestep_end"
[]
[]
[Transfers]
[xfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu q_prime S'
[]
[]
(modules/subchannel/test/tests/problems/SFR/sodium-19pin/test19_implicit.i)
T_in = 660
mass_flux_in = '${fparse 1e+6 * 300.00 / 36000.*0.5}'
P_out = 2.0e5 # Pa
[GlobalParams]
nrings = 3
n_cells = 5
flat_to_flat = 0.056
heated_length = 0.5
pitch = 0.012
[]
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
pin_diameter = 0.01
dwire = 0.002
hwire = 0.0833
spacer_z = '0'
spacer_k = '5.0'
[]
[duct]
type = SCMTriDuctMeshGenerator
input = sub_channel
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = 2.0e5
compute_density = true
compute_viscosity = true
compute_power = true
implicit = true
segregated = true
verbose_subchannel = true
duct_HTC_closure = 'gnielinski'
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = 1000.0 # W
filename = "pin_power_profile19.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[duct_heat_flux_ic]
type = ConstantIC
variable = duct_heat_flux #W/m2
value = 1000.0
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Postprocessors]
[T1]
type = SubChannelPointValue
variable = T
index = 37
execute_on = "timestep_end"
height = 0.5
[]
[T2]
type = SubChannelPointValue
variable = T
index = 36
execute_on = "timestep_end"
height = 0.5
[]
[T3]
type = SubChannelPointValue
variable = T
index = 20
execute_on = "timestep_end"
height = 0.5
[]
[T4]
type = SubChannelPointValue
variable = T
index = 10
execute_on = "timestep_end"
height = 0.5
[]
[T5]
type = SubChannelPointValue
variable = T
index = 4
execute_on = "timestep_end"
height = 0.5
[]
[T6]
type = SubChannelPointValue
variable = T
index = 1
execute_on = "timestep_end"
height = 0.5
[]
[T7]
type = SubChannelPointValue
variable = T
index = 14
execute_on = "timestep_end"
height = 0.5
[]
[T8]
type = SubChannelPointValue
variable = T
index = 28
execute_on = "timestep_end"
height = 0.5
[]
####### Assembly pressure drop
[DP_SubchannelDelta]
type = SubChannelDelta
variable = P
execute_on = 'TIMESTEP_END'
[]
#####
[Mean_Temp]
type = SCMPlanarMean
variable = T
height = 2
[]
[mdot-8]
type = SubChannelPointValue
variable = mdot
index = 28
execute_on = 'TIMESTEP_END'
height = 0.5
[]
[Total_power]
type = ElementIntegralVariablePostprocessor
variable = q_prime
block = sub_channel
[]
[Total_power_SCMDuctPowerPostprocessor]
type = SCMDuctHeatRatePostprocessor
[]
[Total_power_SCMTHPowerPostprocessor]
type = SCMTHPowerPostprocessor
[]
[]
[Executioner]
type = Steady
[]
(modules/subchannel/validation/ORNL_19_pin/test_ORNL_19.i)
# M. Fontana, et al,
# "Temperature distribution in the duct wall and at the exit of a 19-pin simulated lmfbr fuel assembly (ffm bundle 2a),
# "Nuclear Technology, vol. 24, no. 2, pp. 176-200, 1974.
T_in = 588.5
A12 = 1.00423e3
A13 = -0.21390
A14 = -1.1046e-5
rho = '${fparse A12 + A13 * T_in + A14 * T_in * T_in}'
flow_area = 0.000467906 #m2
vol_flow = 4.67E-05 #low flow case
mass_flux_in = '${fparse rho * vol_flow / flow_area}'
P_out = 2.0e5 # Pa
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = 3
n_cells = 40
flat_to_flat = 3.41e-2
heated_length = 0.5334
unheated_length_entry = 0.4064
unheated_length_exit = 0.0762
pin_diameter = 5.84e-3
pitch = 7.26e-3
dwire = 1.42e-3
hwire = 0.3048
spacer_z = '0.0'
spacer_k = '0.0'
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = 2.0e5
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-5
T_tol = 1.0e-4
implicit = true
segregated = false
verbose_multiapps = true
verbose_subchannel = true
interpolation_scheme = upwind
# friction model
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = 4966 #W
filename = "pin_power_profile19.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Executioner]
type = Steady
[]
[Postprocessors]
[T1]
type = SubChannelPointValue
variable = T
index = 37
execute_on = "timestep_end"
height = 1.016
[]
[T2]
type = SubChannelPointValue
variable = T
index = 36
execute_on = "timestep_end"
height = 1.016
[]
[T3]
type = SubChannelPointValue
variable = T
index = 20
execute_on = "timestep_end"
height = 1.016
[]
[T4]
type = SubChannelPointValue
variable = T
index = 10
execute_on = "timestep_end"
height = 1.016
[]
[T5]
type = SubChannelPointValue
variable = T
index = 4
execute_on = "timestep_end"
height = 1.016
[]
[T6]
type = SubChannelPointValue
variable = T
index = 1
execute_on = "timestep_end"
height = 1.016
[]
[T7]
type = SubChannelPointValue
variable = T
index = 14
execute_on = "timestep_end"
height = 1.016
[]
[T8]
type = SubChannelPointValue
variable = T
index = 28
execute_on = "timestep_end"
height = 1.016
[]
####### Assembly pressure drop
[DP_SubchannelDelta]
type = SubChannelDelta
variable = P
execute_on = 'TIMESTEP_END'
[]
#####
[Mean_Temp]
type = SCMPlanarMean
variable = T
height = 2
[]
[Total_power]
type = ElementIntegralVariablePostprocessor
variable = q_prime
[]
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = "3d_ORNL_19.i"
execute_on = "timestep_end"
[]
[]
[Transfers]
[xfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu q_prime S'
[]
[]
(modules/subchannel/validation/EBR-II/XX09_SCM_TR45R.i)
# Following Benchmark Specifications and Data Requirements for EBR-II Shutdown Heat Removal Tests SHRT-17 and SHRT-45R
# Available at: https://publications.anl.gov/anlpubs/2012/06/73647.pdf
# Transient subchannel calculation
###################################################
# Thermal-hydraulics parameters
###################################################
T_in = 616.4 #Kelvin
Total_Surface_Area = 0.000854322 #m3
mass_flux_in = '${fparse 2.427 / Total_Surface_Area}'
P_out = 2.0e5
Power_initial = 379800 #W (Page 26,35 of ANL document)
###################################################
# Geometric parameters
###################################################
scale_factor = 0.01
fuel_pin_pitch = '${fparse 0.5664*scale_factor}'
fuel_pin_diameter = '${fparse 0.4419*scale_factor}'
wire_z_spacing = '${fparse 15.24*scale_factor}'
wire_diameter = '${fparse 0.1244*scale_factor}'
inner_duct_in = '${fparse 4.64*scale_factor}'
n_rings = 5
heated_length = '${fparse 34.3*scale_factor}'
unheated_length_exit = '${fparse 26.9*scale_factor}'
###################################################
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = ${n_rings}
n_cells = 50
flat_to_flat = ${inner_duct_in}
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pin_diameter = ${fuel_pin_diameter}
pitch = ${fuel_pin_pitch}
dwire = ${wire_diameter}
hwire = ${wire_z_spacing}
spacer_z = '0.0'
spacer_k = '0.0'
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = ${n_rings}
n_cells = 50
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[AuxVariables]
[q_prime_init]
block = fuel_pins
[]
[power_history_field]
block = fuel_pins
[]
[q_prime]
block = fuel_pins
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = ${P_out}
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-4
implicit = true
segregated = false
interpolation_scheme = 'upwind'
pin_HTC_closure = 'gnielinski'
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime_init
power = ${Power_initial}
filename = "pin_power_profile61_uniform.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[Functions]
[power_func]
type = PiecewiseLinear
data_file = 'power_history_SHRT45.csv'
format = "columns"
scale_factor = 1.0
[]
[mass_flux_in]
type = PiecewiseLinear
data_file = 'massflow_SHRT45.csv'
format = "columns"
scale_factor = '${fparse mass_flux_in / 2.427}'
[]
[dts]
type = PiecewiseLinear
xy_data = '0.0 0.1
5.0 2.0
100 2.0
110 20.0
900 20.0'
[]
[]
[Controls]
[mass_flux_ctrl]
type = RealFunctionControl
parameter = 'Postprocessors/mass_flux_PP/value'
function = 'mass_flux_in'
execute_on = 'initial timestep_begin'
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
block = sub_channel
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = mass_flux_PP
execute_on = 'timestep_begin'
[]
[populate_power_history]
type = FunctionAux
variable = power_history_field
function = 'power_func'
execute_on = 'INITIAL TIMESTEP_BEGIN'
[]
[change_q_prime]
type = ParsedAux
variable = q_prime
coupled_variables = 'q_prime_init power_history_field'
expression = 'q_prime_init*power_history_field'
execute_on = 'INITIAL TIMESTEP_BEGIN'
[]
[]
[Outputs]
csv = true
[]
[Postprocessors]
[report_pressure_outlet]
type = Receiver
default = ${P_out}
[]
[TTC-31]
type = SubChannelPointValue
variable = T
index = 0
execute_on = 'initial timestep_end'
height = 0.322
[]
[post_func]
type = ElementIntegralVariablePostprocessor
block = fuel_pins
variable = q_prime
execute_on = 'INITIAL TIMESTEP_BEGIN'
[]
[mass_flux_PP]
type = ConstantPostprocessor
value = ${mass_flux_in}
[]
[mass_flow_PP]
type = ParsedPostprocessor
expression = '${Total_Surface_Area} * mass_flux_PP'
pp_names = 'mass_flux_PP'
[]
[]
[Executioner]
type = Transient
start_time = -1
end_time = 900.0
[TimeStepper]
type = FunctionDT
function = dts
min_dt = 0.1
growth_factor = 2.0
[]
dtmax = 20
# num_steps = 15
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = TransientMultiApp
input_files = '3d_SCM_TR.i'
execute_on = 'INITIAL TIMESTEP_END'
catch_up = true
[]
[]
[Transfers]
[subchannel_transfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu S'
[]
[pin_transfer]
type = SCMPinSolutionTransfer
to_multi_app = viz
variable = 'Tpin q_prime'
[]
[]
(modules/subchannel/test/tests/problems/SFR/sodium-19pin/test19_explicit.i)
T_in = 660
mass_flux_in = '${fparse 1e+6 * 300.00 / 36000.*0.5}'
P_out = 2.0e5 # Pa
[GlobalParams]
nrings = 3
n_cells = 5
flat_to_flat = 0.056
heated_length = 0.5
pitch = 0.012
[]
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
pin_diameter = 0.01
dwire = 0.002
hwire = 0.0833
spacer_z = '0'
spacer_k = '5.0'
[]
[duct]
type = SCMTriDuctMeshGenerator
input = sub_channel
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = 2.0e5
compute_density = true
compute_viscosity = true
compute_power = true
implicit = false
segregated = true
verbose_subchannel = true
duct_HTC_closure = 'gnielinski'
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = 1000.0 # W
filename = "pin_power_profile19.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Postprocessors]
[T1]
type = SubChannelPointValue
variable = T
index = 37
execute_on = "timestep_end"
height = 0.5
[]
[T2]
type = SubChannelPointValue
variable = T
index = 36
execute_on = "timestep_end"
height = 0.5
[]
[T3]
type = SubChannelPointValue
variable = T
index = 20
execute_on = "timestep_end"
height = 0.5
[]
[T4]
type = SubChannelPointValue
variable = T
index = 10
execute_on = "timestep_end"
height = 0.5
[]
[T5]
type = SubChannelPointValue
variable = T
index = 4
execute_on = "timestep_end"
height = 0.5
[]
[T6]
type = SubChannelPointValue
variable = T
index = 1
execute_on = "timestep_end"
height = 0.5
[]
[T7]
type = SubChannelPointValue
variable = T
index = 14
execute_on = "timestep_end"
height = 0.5
[]
[T8]
type = SubChannelPointValue
variable = T
index = 28
execute_on = "timestep_end"
height = 0.5
[]
####### Assembly pressure drop
[DP_SubchannelDelta]
type = SubChannelDelta
variable = P
execute_on = 'TIMESTEP_END'
[]
#####
[Mean_Temp]
type = SCMPlanarMean
variable = T
height = 2
[]
[Total_power]
type = ElementIntegralVariablePostprocessor
variable = q_prime
block = sub_channel
[]
[mdot-8]
type = SubChannelPointValue
variable = mdot
index = 28
execute_on = 'TIMESTEP_END'
height = 0.5
[]
[]
[Executioner]
type = Steady
[]
(modules/subchannel/examples/duct/test.i)
T_in = 660
mass_flux_in = '${fparse 1e+6 * 37.00 / 36000.*0.5}'
P_out = 2.0e5 # Pa
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = 4
n_cells = 100
flat_to_flat = 0.085
heated_length = 1.0
pin_diameter = 0.01
pitch = 0.012
dwire = 0.002
hwire = 0.0833
spacer_z = '0 0.2 0.4 0.6 0.8'
spacer_k = '0.1 0.1 0.1 0.1 0.10'
[]
[duct]
type = SCMTriDuctMeshGenerator
input = sub_channel
nrings = 4
n_cells = 100
flat_to_flat = 0.085
heated_length = 1.0
pitch = 0.012
[]
[]
[AuxVariables]
[mdot]
block = subchannel
[]
[SumWij]
block = subchannel
[]
[P]
block = subchannel
[]
[DP]
block = subchannel
[]
[h]
block = subchannel
[]
[T]
block = subchannel
[]
[rho]
block = subchannel
[]
[S]
block = subchannel
[]
[w_perim]
block = subchannel
[]
[q_prime]
block = subchannel
[]
[mu]
block = subchannel
[]
[displacement]
block = subchannel
[]
[duct_heat_flux]
block = duct
[]
[Tduct]
block = duct
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[Problem]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = 2.0e5
compute_density = false
compute_viscosity = false
compute_power = true
P_tol = 1.0e-5
T_tol = 1.0e-5
implicit = true
segregated = false
staggered_pressure = false
verbose_multiapps = true
verbose_subchannel = false
duct_HTC_closure = 'gnielinski'
friction_closure = 'cheng'
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 1.0
[]
[]
[ICs]
[S_IC]
type = SCMTriFlowAreaIC
variable = S
[]
[w_perim_IC]
type = SCMTriWettedPerimIC
variable = w_perim
[]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = 1e5 #1.000e5 # W
filename = "pin_power_profile37.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[T_duct_ic]
type = ConstantIC
variable = Tduct
value = ${T_in}
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[UserObjects]
[Tduct_avg_uo]
type = NearestPointLayeredAverage
direction = z
num_layers = 1000
variable = Tduct
block = duct
points = '0 0 0'
execute_on = 'TIMESTEP_END'
[]
[]
[Outputs]
exodus = true
[]
[Executioner]
type = Steady
petsc_options_iname = '-pc_type -pc_hypre_type'
petsc_options_value = 'hypre boomeramg'
fixed_point_max_its = 2
fixed_point_min_its = 2
fixed_point_rel_tol = 1e-6
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
# Multiapp to duct heat conduction module
[duct_map]
type = FullSolveMultiApp
input_files = wrapper.i # seperate file for multiapps due to radial power profile
execute_on = 'timestep_end'
positions = '0 0 0' #center of assembly
bounding_box_padding = '10.0 10.0 10.0'
[]
# Multiapp to detailed mesh for vizualization
[viz]
type = FullSolveMultiApp
input_files = "3d.i"
execute_on = 'timestep_end'
[]
[]
[Transfers]
[duct_temperature_transfer] # Send duct temperature to heat conduction
type = MultiAppInterpolationTransfer
to_multi_app = duct_map
source_variable = Tduct
variable = duct_surface_temperature
[]
[displacement_transfer]
type = MultiAppGeneralFieldNearestNodeTransfer
from_multi_app = duct_map
source_variable = disp_magnitude
variable = displacement
[]
[q_prime] # Recover q_prime from heat conduction solve
type = MultiAppInterpolationTransfer
from_multi_app = duct_map
source_variable = q_prime
variable = duct_heat_flux
[]
[xfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu q_prime S displacement'
[]
[]
(modules/subchannel/test/tests/problems/SFR/EBR-II/XX09_SS_SHRT17.i)
# Following Benchmark Specifications and Data Requirements for EBR-II Shutdown Heat Removal Tests SHRT-17 and SHRT-45R
# Available at: https://publications.anl.gov/anlpubs/2012/06/73647.pdf
###################################################
#Steady state subchannel calcultion,with adapted massflow rate
# Thermal-hydraulics parameters
###################################################
T_in = 624.70556 #Kelvin
Total_Surface_Area = 0.000854322 #m3
mass_flux_in = '${fparse 2.6923 / Total_Surface_Area}' #
P_out = 2.0e5
Power_initial = 486200 #W (Page 26,35 of ANL document)
###################################################
# Geometric parameters
###################################################
scale_factor = 0.01
fuel_pin_pitch = '${fparse 0.5664*scale_factor}'
fuel_pin_diameter = '${fparse 0.4419*scale_factor}'
wire_z_spacing = '${fparse 15.24*scale_factor}'
wire_diameter = '${fparse 0.1244*scale_factor}'
inner_duct_in = '${fparse 4.64*scale_factor}'
n_rings = 5
heated_length = '${fparse 34.3*scale_factor}'
unheated_length_exit = '${fparse 26.9*scale_factor}'
###################################################
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = ${n_rings}
n_cells = 50
flat_to_flat = ${inner_duct_in}
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pin_diameter = ${fuel_pin_diameter}
pitch = ${fuel_pin_pitch}
dwire = ${wire_diameter}
hwire = ${wire_z_spacing}
spacer_z = '0.0'
spacer_k = '0.0'
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = ${n_rings}
n_cells = 50
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = ${P_out}
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-5
implicit = true
segregated = false
interpolation_scheme = 'upwind'
verbose_subchannel = true
pin_HTC_closure = 'gnielinski'
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = ${Power_initial}
filename = "pin_power_profile61_uniform.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
block = sub_channel
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Postprocessors]
[TTC-27]
type = SubChannelPointValue
variable = T
index = 91
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-28]
type = SubChannelPointValue
variable = T
index = 50
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-29]
type = SubChannelPointValue
variable = T
index = 21
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-30]
type = SubChannelPointValue
variable = T
index = 4
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-31]
type = SubChannelPointValue
variable = T
index = 2
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-32]
type = SubChannelPointValue
variable = T
index = 16
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-33]
type = SubChannelPointValue
variable = T
index = 42
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-34]
type = SubChannelPointValue
variable = T
index = 80
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-35]
type = SubChannelPointValue
variable = T
index = 107
execute_on = 'TIMESTEP_END'
height = 0.322
[]
####### Assembly pressure drop
[DP_SubchannelDelta]
type = SubChannelDelta
variable = P
execute_on = 'TIMESTEP_END'
[]
#####
[Mean_Temp]
type = SCMPlanarMean
variable = T
height = 2
[]
#####
[mdot-35]
type = SubChannelPointValue
variable = mdot
index = 107
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Executioner]
type = Steady
[]
(modules/subchannel/validation/EBR-II/XX09_SCM_SS17_corrected.i)
# Following Benchmark Specifications and Data Requirements for EBR-II Shutdown Heat Removal Tests SHRT-17 and SHRT-45R
# Available at: https://publications.anl.gov/anlpubs/2012/06/73647.pdf
###################################################
# Steady state subchannel calculation
# Thermal-hydraulics parameters
###################################################
T_in = 624.70556 #Kelvin
Total_Surface_Area = 0.000854322 #m2
Mass_In = 2.45 #kg/sec
mass_flux_in = '${fparse Mass_In / Total_Surface_Area}' #kg/m2
P_out = 2.0e5 #Pa
Power_initial = 486200 #W (Page 26,35 of ANL document)
###################################################
# Geometric parameters
###################################################
scale_factor = 0.01
fuel_pin_pitch = '${fparse 0.5664*scale_factor}'
fuel_pin_diameter = '${fparse 0.4419*scale_factor}'
wire_z_spacing = '${fparse 15.24*scale_factor}'
wire_diameter = '${fparse 0.1244*scale_factor}'
inner_duct_in = '${fparse 4.64*scale_factor}'
n_rings = 5
heated_length = '${fparse 34.3*scale_factor}'
unheated_length_exit = '${fparse 26.9*scale_factor}'
###################################################
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = ${n_rings}
n_cells = 50
flat_to_flat = ${inner_duct_in}
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pin_diameter = ${fuel_pin_diameter}
pitch = ${fuel_pin_pitch}
dwire = ${wire_diameter}
hwire = ${wire_z_spacing}
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = ${n_rings}
n_cells = 50
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[duct]
type = SCMTriDuctMeshGenerator
input = fuel_pins
nrings = ${n_rings}
n_cells = 50
flat_to_flat = ${inner_duct_in}
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[]
[Functions]
[axial_heat_rate]
type = ParsedFunction
expression = '(pi/2)*sin(pi*z/L)*exp(-alpha*z)/(1.0/alpha*(1.0 - exp(-alpha*L)))*L'
symbol_names = 'L alpha'
symbol_values = '${heated_length} 1.8012'
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = ${P_out}
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-5
implicit = true
segregated = false
interpolation_scheme = 'upwind'
verbose_subchannel = true
pin_HTC_closure = 'gnielinski'
duct_HTC_closure = 'gnielinski'
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = ${Power_initial}
filename = "pin_power_profile61.txt"
axial_heat_rate = axial_heat_rate
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
block = sub_channel
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
csv = true
[]
[Postprocessors]
[TTC-27]
type = SubChannelPointValue
variable = T
index = 91
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-28]
type = SubChannelPointValue
variable = T
index = 50
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-29]
type = SubChannelPointValue
variable = T
index = 21
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-30]
type = SubChannelPointValue
variable = T
index = 4
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-31]
type = SubChannelPointValue
variable = T
index = 2
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-32]
type = SubChannelPointValue
variable = T
index = 16
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-33]
type = SubChannelPointValue
variable = T
index = 42
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-34]
type = SubChannelPointValue
variable = T
index = 80
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-35]
type = SubChannelPointValue
variable = T
index = 107
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[MTC-20]
type = SubChannelPointValue
variable = T
index = 33
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-22]
type = SubChannelPointValue
variable = T
index = 3
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-24]
type = SubChannelPointValue
variable = T
index = 28
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-25]
type = SubChannelPointValue
variable = T
index = 60
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-26]
type = SubChannelPointValue
variable = T
index = 106
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[14TC-37]
type = SubChannelPointValue
variable = T
index = 52
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[14TC-39]
type = SubChannelPointValue
variable = T
index = 6
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[14TC-41]
type = SubChannelPointValue
variable = T
index = 40
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[14TC-43]
type = SubChannelPointValue
variable = T
index = 105
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[]
[Executioner]
type = Steady
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = '3d_SCM_SS.i'
execute_on = 'FINAL'
[]
[]
[Transfers]
[subchannel_transfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu S'
[]
[pin_transfer]
type = SCMPinSolutionTransfer
to_multi_app = viz
variable = 'Tpin q_prime'
[]
[]
(modules/subchannel/examples/MultiApp/fuel_assembly.i)
###################################################
# Thermal-hydraulics parameters
###################################################
T_in = 628.15 # K
P_out = 758423 # Pa
reactor_power = 250e6 #WTh
fuel_assemblies_per_power_unit = '${fparse 2.5}'
fuel_pins_per_assembly = 217
pin_power = '${fparse reactor_power/(fuel_assemblies_per_power_unit*fuel_pins_per_assembly)}' # Approx.
mass_flux_in = '${fparse 2786}' # kg/(m2.s)
###################################################
# Geometric parameters
###################################################
n_cells = 50
# units are cm - do not forget to convert to meter
scale_factor = 0.01
fuel_element_pitch = '${fparse 14.598*scale_factor}'
inter_assembly_gap = '${fparse 0.4*scale_factor}'
duct_thickness = '${fparse 0.3*scale_factor}'
fuel_pin_pitch = '${fparse 0.904*scale_factor}'
fuel_pin_diameter = '${fparse 0.8*scale_factor}'
wire_z_spacing = '${fparse 20.32*scale_factor}'
wire_diameter = '${fparse 0.103*scale_factor}'
n_rings = 9
# Reduced height for convenience
length_entry_fuel = '${fparse 20*scale_factor}'
length_heated_fuel = '${fparse 40*scale_factor}'
length_outlet_fuel = '${fparse 20*scale_factor}'
# height = '${fparse length_entry_fuel+length_heated_fuel+length_outlet_fuel}'
orifice_plate_height = '${fparse 5*scale_factor}'
duct_outside = '${fparse fuel_element_pitch - inter_assembly_gap}'
duct_inside = '${fparse duct_outside - 2 * duct_thickness}'
###################################################
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = '${fparse n_rings}'
n_cells = ${n_cells}
flat_to_flat = '${fparse duct_inside}'
unheated_length_entry = '${fparse length_entry_fuel}'
heated_length = '${fparse length_heated_fuel}'
unheated_length_exit = '${fparse length_outlet_fuel}'
pin_diameter = '${fparse fuel_pin_diameter}'
pitch = '${fparse fuel_pin_pitch}'
dwire = '${fparse wire_diameter}'
hwire = '${fparse wire_z_spacing}'
spacer_z = '${fparse orifice_plate_height} ${fparse length_entry_fuel}'
spacer_k = '0.5 0.5'
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = '${fparse n_rings}'
n_cells = ${n_cells}
unheated_length_entry = '${fparse length_entry_fuel}'
heated_length = '${fparse length_heated_fuel}'
unheated_length_exit = '${fparse length_outlet_fuel}'
pitch = '${fparse fuel_pin_pitch}'
[]
[duct]
type = SCMTriDuctMeshGenerator
input = fuel_pins
nrings = '${fparse n_rings}'
n_cells = ${n_cells}
flat_to_flat = '${fparse duct_inside}'
unheated_length_entry = '${fparse length_entry_fuel}'
heated_length = '${fparse length_heated_fuel}'
unheated_length_exit = '${fparse length_outlet_fuel}'
pitch = '${fparse fuel_pin_pitch}'
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
P_out = ${P_out}
# Solver parameters
n_blocks = 10
implicit = false
segregated = true
staggered_pressure = false
# Tolerances
P_tol = 1.0e-4
T_tol = 1.0e-8
# Heat Transfer Correlation
pin_HTC_closure = 'gnielinski'
duct_HTC_closure = 'gnielinski'
# Friction Correlation
friction_closure = 'Cheng'
# Turbulent mixing Correlation
mixing_closure = 'cheng_todreas'
# Output
compute_density = true
compute_viscosity = true
compute_power = true
verbose_multiapps = true
verbose_subchannel = false
full_output = true
[]
[SCMClosures]
[Cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
[]
[]
[ICs]
# Geometry
# Operating conditions
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = ${pin_power} # W
filename = "pin_power_profile217.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[T_duct_ic]
type = ConstantIC
variable = Tduct
value = ${T_in}
[]
# Fluid properties
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
block = sub_channel
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
block = sub_channel
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Executioner]
type = Transient
num_steps = 1
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = TransientMultiApp
input_files = "3d.i"
execute_on = "final"
[]
[]
[Transfers]
[subchannel_transfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu S'
[]
[pin_transfer]
type = SCMPinSolutionTransfer
to_multi_app = viz
variable = 'Tpin q_prime'
[]
[]
(modules/combined/test/tests/subchannel_thm_coupling/subchannel.i)
# Based on M. Fontana, et al. this arbitrary subassembly is used for THM-SC coupling
T_in = 583.0 #K
flow_area = 0.0004980799633447909 #m2
mass_flux_in = '${fparse 1.0/flow_area}'
P_out = 2e5 # Pa
###################################################
# Geometric parameters
###################################################
n_cells = 25
n_rings = 3
fuel_pin_pitch = 7.26e-3
fuel_pin_diameter = 5.84e-3
wire_z_spacing = 0.3048
wire_diameter = 1.42e-3
inner_duct_in = 3.41e-2
heated_length = 1.0
###################################################
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = ${n_rings}
n_cells = ${n_cells}
flat_to_flat = ${inner_duct_in}
heated_length = ${heated_length}
pin_diameter = ${fuel_pin_diameter}
pitch = ${fuel_pin_pitch}
dwire = ${wire_diameter}
hwire = ${wire_z_spacing}
spacer_z = '0.0'
spacer_k = '0.0'
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = ${n_rings}
n_cells = ${n_cells}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[]
[FluidProperties]
[Sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = Sodium
n_blocks = 1
P_out = report_pressure_outlet
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-3
T_tol = 1.0e-3
implicit = true
segregated = false
staggered_pressure = false
verbose_multiapps = true
verbose_subchannel = false
interpolation_scheme = 'upwind'
pin_HTC_closure = 'gnielinski'
friction_closure = 'Cheng'
mixing_closure = 'Cheng_Todreas'
[]
[SCMClosures]
[Cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[Cheng_Todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[S_IC]
type = SCMTriFlowAreaIC
variable = S
[]
[w_perim_IC]
type = SCMTriWettedPerimIC
variable = w_perim
[]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = 10000 #W
filename = "pin_power_profile19.txt"
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[Dpin_ic]
type = ConstantIC
variable = Dpin
value = ${fuel_pin_diameter}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = Sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = Sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = Sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = FunctorAux
functor = report_temperature_inlet
variable = T
boundary = inlet
execute_on = 'timestep_begin'
block = sub_channel
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = report_mass_flux_inlet
execute_on = 'timestep_begin'
block = sub_channel
[]
[]
[Outputs]
csv = true
[]
[Executioner]
type = Steady
[]
[Postprocessors]
[total_pressure_drop_SC]
type = SubChannelDelta
variable = P
execute_on = "timestep_end"
[]
[total_pressure_drop_SC_limited]
type = ParsedPostprocessor
pp_names = 'total_pressure_drop_SC'
expression = 'min(total_pressure_drop_SC, 1e6)'
execute_on = "timestep_end"
[]
[Total_power]
type = ElementIntegralVariablePostprocessor
variable = q_prime
block = fuel_pins
[]
[report_mass_flux_inlet]
type = Receiver
default = ${mass_flux_in}
[]
[report_temperature_inlet]
type = Receiver
default = ${T_in}
force_preaux = true
[]
[report_pressure_outlet]
type = Receiver
default = ${P_out}
[]
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = '3D.i'
execute_on = 'FINAL'
[]
[]
[Transfers]
[subchannel_transfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P h T rho mu S'
[]
[pin_transfer]
type = SCMPinSolutionTransfer
to_multi_app = viz
variable = 'Dpin Tpin q_prime'
[]
[]
(modules/subchannel/validation/areva_FCTF/FCTF_deformed.i)
# Following Benchmark Specifications and Data Requirements for the AREVA heated-bundle test in its Fuel Cooling Test Facility (FCTF)
# as part of a U.S. DOE funded project: Towards a Longer-Life Core. In partnership with TerraPower, TAMU and ANL,
# AREVA NP tested a wire-wrapped pin bundle. The bundle consists of electrically heated pins and non-heated pins.
# This test collected measurements to evaluate thermal hydraulic performance of a wire wrapped bundle, useful for CFD and other software validation.
# Available at: https://www.osti.gov/servlets/purl/1346027/
###################################################
# Steady state subchannel calculation
# Thermal-hydraulics parameters
###################################################
T_in = 305.68 #Kelvin (32.53 C)
# mu = 0.0007646 #Pas
# Re = 20500
# Dh = 0.004535
Total_Surface_Area_SC = 0.00285294 #m2
Total_Surface_Area_EXP = 0.002808 #m2
P_out = 829370.355 # Pa (120.29 psia)
Power = 90640 # Watt Each heater pin had a max power of 30kW
# Heater 17 (18) not working.
# test:19 power = 22613 22610 22754 22663 [W], Total Power = 90640 [W], mdot_average = 9.576 [kg/s], Re = 20300
# Index of heated pins per silicon controled rectifiers (Areva notation):1 3 6 7 || 4 5 11 15 ||2 9 19 40 60 || 13 44 48 52 56 (from bottom to top)
# Index of heated pins per silicon controled rectifiers (SC notation):0 3 6 1 || 4 5 12 16 || 2 10 8 43 39 || 14 47 51 55 59 (from top to bottom) 38 areva->41 SC
# Relative power of pin per rectifier: 1.12266659312 || 1.12251765225 || 0.90373345101 || 0.90011915269
mdot_average = '${fparse 9.43 * Total_Surface_Area_SC / Total_Surface_Area_EXP}'
mass_flux_in = '${fparse mdot_average / Total_Surface_Area_SC}' #kg/m2
###################################################
# Geometric parameters (non-deformed heated bundle)
###################################################
fuel_pin_pitch = 0.01122652 #m
fuel_pin_diameter = 0.009514 #m
wire_z_spacing = 0.285 #m
wire_diameter = 0.0017062 #m
inner_duct_in = 0.092 #m
n_rings = 5
unheated_length_entry = 1.14 #m
heated_length = 1.71 #m
unheated_length_exit = 0.855 #m
###################################################
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = ${n_rings}
n_cells = 65
flat_to_flat = ${inner_duct_in}
unheated_length_entry = ${unheated_length_entry}
heated_length = ${heated_length}
unheated_length_exit = ${unheated_length_exit}
pin_diameter = ${fuel_pin_diameter}
pitch = ${fuel_pin_pitch}
dwire = ${wire_diameter}
hwire = ${wire_z_spacing}
spacer_z = '0.0'
spacer_k = '0.0'
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = ${n_rings}
n_cells = 65
unheated_length_entry = ${unheated_length_entry}
heated_length = ${heated_length}
unheated_length_exit = ${unheated_length_exit}
pitch = ${fuel_pin_pitch}
[]
[]
[Functions]
[axial_heat_rate]
type = ParsedFunction
expression = '(0.4*pi/(pi-2))*sin(pi*z/L) + 1.4 - (0.4*pi/(pi-2))'
symbol_names = 'L'
symbol_values = '${heated_length}'
[]
[]
[FluidProperties]
[water]
type = Water97FluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = water
n_blocks = 1
P_out = ${P_out}
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-4
implicit = true
segregated = false
interpolation_scheme = 'upwind'
verbose_subchannel = true
# Heat Transfer Correlations
pin_HTC_closure = 'gnielinski'
# friction model
friction_closure = 'cheng'
full_output = true
# Turbulent mixing Correlation
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = ${Power}
filename = "pin_power_profile61.txt"
axial_heat_rate = axial_heat_rate
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = water
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = water
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = water
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[displacement_ic]
type = FCTFdisplacementIC
variable = displacement
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
block = sub_channel
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
!include deformed_duct_pp.i
[Executioner]
type = Steady
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = '3D.i'
execute_on = 'FINAL'
[]
[]
[Transfers]
[subchannel_transfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu S displacement'
[]
[pin_transfer]
type = SCMPinSolutionTransfer
to_multi_app = viz
variable = 'Dpin Tpin q_prime'
[]
[]
(modules/subchannel/validation/EBR-II/XX09_SCM_SS45R.i)
# Following Benchmark Specifications and Data Requirements for EBR-II Shutdown Heat Removal Tests SHRT-17 and SHRT-45R
# Available at: https://publications.anl.gov/anlpubs/2012/06/73647.pdf
###################################################
# Steady state subchannel calculation
# Thermal-hydraulics parameters
###################################################
T_in = 616.4 #Kelvin
Total_Surface_Area = 0.000854322 #m2
Mass_In = 2.427 #kg/sec
mass_flux_in = '${fparse Mass_In / Total_Surface_Area}' #kg/m2
P_out = 2.0e5
Power_initial = 379800 #W (Page 26,35 of ANL document)
###################################################
# Geometric parameters
###################################################
scale_factor = 0.01
fuel_pin_pitch = '${fparse 0.5664*scale_factor}'
fuel_pin_diameter = '${fparse 0.4419*scale_factor}'
wire_z_spacing = '${fparse 15.24*scale_factor}'
wire_diameter = '${fparse 0.1244*scale_factor}'
inner_duct_in = '${fparse 4.64*scale_factor}'
n_rings = 5
heated_length = '${fparse 34.3*scale_factor}'
unheated_length_exit = '${fparse 26.9*scale_factor}'
###################################################
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = ${n_rings}
n_cells = 50
flat_to_flat = ${inner_duct_in}
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pin_diameter = ${fuel_pin_diameter}
pitch = ${fuel_pin_pitch}
dwire = ${wire_diameter}
hwire = ${wire_z_spacing}
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = ${n_rings}
n_cells = 50
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[duct]
type = SCMTriDuctMeshGenerator
input = fuel_pins
nrings = ${n_rings}
n_cells = 50
flat_to_flat = ${inner_duct_in}
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[]
[AuxVariables]
[q_prime_init]
block = fuel_pins
[]
[power_history_field]
block = fuel_pins
[]
[]
[Functions]
[axial_heat_rate]
type = ParsedFunction
expression = '(pi/2)*sin(pi*z/L)*exp(-alpha*z)/(1.0/alpha*(1.0 - exp(-alpha*L)))*L'
symbol_names = 'L alpha'
symbol_values = '${heated_length} 1.8012'
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = ${P_out}
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-5
implicit = true
segregated = false
interpolation_scheme = 'upwind'
verbose_subchannel = true
pin_HTC_closure = 'gnielinski'
duct_HTC_closure = 'gnielinski'
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = ${Power_initial}
filename = "pin_power_profile61_uniform.txt"
axial_heat_rate = axial_heat_rate
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
block = sub_channel
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
csv = true
[]
[Postprocessors]
[TTC-27]
type = SubChannelPointValue
variable = T
index = 91
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-28]
type = SubChannelPointValue
variable = T
index = 50
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-29]
type = SubChannelPointValue
variable = T
index = 21
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-30]
type = SubChannelPointValue
variable = T
index = 4
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-31]
type = SubChannelPointValue
variable = T
index = 2
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-32]
type = SubChannelPointValue
variable = T
index = 16
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-33]
type = SubChannelPointValue
variable = T
index = 42
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-34]
type = SubChannelPointValue
variable = T
index = 80
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-35]
type = SubChannelPointValue
variable = T
index = 107
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[MTC-20]
type = SubChannelPointValue
variable = T
index = 33
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-22]
type = SubChannelPointValue
variable = T
index = 3
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-24]
type = SubChannelPointValue
variable = T
index = 28
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-25]
type = SubChannelPointValue
variable = T
index = 60
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-26]
type = SubChannelPointValue
variable = T
index = 106
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[14TC-37]
type = SubChannelPointValue
variable = T
index = 52
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[14TC-39]
type = SubChannelPointValue
variable = T
index = 6
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[14TC-41]
type = SubChannelPointValue
variable = T
index = 40
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[14TC-43]
type = SubChannelPointValue
variable = T
index = 105
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[]
[Executioner]
type = Steady
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = '3d_SCM_SS.i'
execute_on = 'FINAL'
[]
[]
[Transfers]
[subchannel_transfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu S'
[]
[pin_transfer]
type = SCMPinSolutionTransfer
to_multi_app = viz
variable = 'Tpin q_prime'
[]
[]
(modules/subchannel/test/tests/problems/heat_transfer_correlations/XX09_SCM_SS17.i)
# Following Benchmark Specifications and Data Requirements for EBR-II Shutdown Heat Removal Tests SHRT-17 and SHRT-45R
# Available at: https://publications.anl.gov/anlpubs/2012/06/73647.pdf
###################################################
# Steady state subchannel calcultion
# Thermal-hydraulics parameters
###################################################
T_in = 624.70556 #Kelvin
Total_Surface_Area = 0.000854322 #m2
Mass_In = 2.45 #kg/sec
mass_flux_in = '${fparse Mass_In / Total_Surface_Area}' #kg/m2
P_out = 2.0e5 #Pa
Power_initial = 486200 #W (Page 26,35 of ANL document)
###################################################
# Geometric parameters
###################################################
scale_factor = 0.01
fuel_pin_pitch = '${fparse 0.5664*scale_factor}'
fuel_pin_diameter = '${fparse 0.4419*scale_factor}'
wire_z_spacing = '${fparse 15.24*scale_factor}'
wire_diameter = '${fparse 0.1244*scale_factor}'
inner_duct_in = '${fparse 4.64*scale_factor}'
n_rings = 5
heated_length = '${fparse 34.3*scale_factor}'
unheated_length_exit = '${fparse 26.9*scale_factor}'
###################################################
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = ${n_rings}
n_cells = 20
flat_to_flat = ${inner_duct_in}
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pin_diameter = ${fuel_pin_diameter}
pitch = ${fuel_pin_pitch}
dwire = ${wire_diameter}
hwire = ${wire_z_spacing}
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = ${n_rings}
n_cells = 20
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[duct]
type = SCMTriDuctMeshGenerator
input = fuel_pins
nrings = ${n_rings}
n_cells = 20
flat_to_flat = ${inner_duct_in}
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[]
[Functions]
[axial_heat_rate]
type = ParsedFunction
expression = '(pi/2)*sin(pi*z/L)*exp(-alpha*z)/(1.0/alpha*(1.0 - exp(-alpha*L)))*L'
symbol_names = 'L alpha'
symbol_values = '${heated_length} 1.8012'
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = ${P_out}
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-5
implicit = true
segregated = false
interpolation_scheme = 'upwind'
verbose_subchannel = true
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[dittus-boelter]
type = SCMHTCDittusBoelter
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[kazimi-carelli]
type = SCMHTCKazimiCarelli
[]
[schad-modified]
type = SCMHTCSchadModified
[]
[graber-rieger]
type = SCMHTCGraberRieger
[]
[borishanskii]
type = SCMHTCBorishanskii
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
# Keep T manually declared and unrestricted so this legacy regression continues
# to compare against the pre-scoped AuxVariable golds. The automatic
# SubChannelAddVariablesAction path remains block-restricted for normal inputs.
[AuxVariables]
[T]
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = ${Power_initial}
filename = "pin_power_profile61_uniform.txt"
axial_heat_rate = axial_heat_rate
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
block = sub_channel
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
csv = true
[]
[Postprocessors]
### Central pin inlet temperature
[Pin_Temp_0_Inlet]
type = SCMPinSurfaceTemperature
index = 0
height = ${fparse heated_length*0.01}
[]
### Central pin center temperature
[Pin_Temp_1_Center]
type = SCMPinSurfaceTemperature
index = 0
height = ${fparse heated_length*0.5}
[]
### Central pin outlet temperature
[Pin_Temp_2_Outlet]
type = SCMPinSurfaceTemperature
index = 0
height = ${fparse heated_length*0.99}
[]
[]
[Executioner]
type = Steady
[]
(modules/subchannel/validation/EBR-II/XX09_SCM_SS17.i)
# Following Benchmark Specifications and Data Requirements for EBR-II Shutdown Heat Removal Tests SHRT-17 and SHRT-45R
# Available at: https://publications.anl.gov/anlpubs/2012/06/73647.pdf
###################################################
# Steady state subchannel calculation
# Thermal-hydraulics parameters
###################################################
T_in = 624.70556 #Kelvin
Total_Surface_Area = 0.000854322 #m2
Mass_In = 2.45 #kg/sec
mass_flux_in = '${fparse Mass_In / Total_Surface_Area}' #kg/m2
P_out = 2.0e5 #Pa
Power_initial = 486200 #W (Page 26,35 of ANL document)
###################################################
# Geometric parameters
###################################################
scale_factor = 0.01
fuel_pin_pitch = '${fparse 0.5664*scale_factor}'
fuel_pin_diameter = '${fparse 0.4419*scale_factor}'
wire_z_spacing = '${fparse 15.24*scale_factor}'
wire_diameter = '${fparse 0.1244*scale_factor}'
inner_duct_in = '${fparse 4.64*scale_factor}'
n_rings = 5
heated_length = '${fparse 34.3*scale_factor}'
unheated_length_exit = '${fparse 26.9*scale_factor}'
###################################################
[TriSubChannelMesh]
[sub_channel]
type = SCMTriSubChannelMeshGenerator
nrings = ${n_rings}
n_cells = 50
flat_to_flat = ${inner_duct_in}
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pin_diameter = ${fuel_pin_diameter}
pitch = ${fuel_pin_pitch}
dwire = ${wire_diameter}
hwire = ${wire_z_spacing}
[]
[fuel_pins]
type = SCMTriPinMeshGenerator
input = sub_channel
nrings = ${n_rings}
n_cells = 50
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[duct]
type = SCMTriDuctMeshGenerator
input = fuel_pins
nrings = ${n_rings}
n_cells = 50
flat_to_flat = ${inner_duct_in}
unheated_length_exit = ${unheated_length_exit}
heated_length = ${heated_length}
pitch = ${fuel_pin_pitch}
[]
[]
[Functions]
[axial_heat_rate]
type = ParsedFunction
expression = '(pi/2)*sin(pi*z/L)*exp(-alpha*z)/(1.0/alpha*(1.0 - exp(-alpha*L)))*L'
symbol_names = 'L alpha'
symbol_values = '${heated_length} 1.8012'
[]
[]
[FluidProperties]
[sodium]
type = PBSodiumFluidProperties
[]
[]
[SubChannel]
type = TriSubChannel1PhaseProblem
fp = sodium
n_blocks = 1
P_out = ${P_out}
compute_density = true
compute_viscosity = true
compute_power = true
P_tol = 1.0e-4
T_tol = 1.0e-5
implicit = true
segregated = false
interpolation_scheme = 'upwind'
verbose_subchannel = true
pin_HTC_closure = 'gnielinski'
duct_HTC_closure = 'gnielinski'
friction_closure = 'cheng'
full_output = true
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[gnielinski]
type = SCMHTCGnielinski
[]
[cheng_todreas]
type = SCMMixingChengTodreas
CT = 2.6
[]
[]
[ICs]
[q_prime_IC]
type = SCMTriPowerIC
variable = q_prime
power = ${Power_initial}
filename = "pin_power_profile61_uniform.txt"
axial_heat_rate = axial_heat_rate
[]
[T_ic]
type = ConstantIC
variable = T
value = ${T_in}
[]
[P_ic]
type = ConstantIC
variable = P
value = 0.0
[]
[DP_ic]
type = ConstantIC
variable = DP
value = 0.0
[]
[Viscosity_ic]
type = ViscosityIC
variable = mu
p = ${P_out}
T = T
fp = sodium
[]
[rho_ic]
type = RhoFromPressureTemperatureIC
variable = rho
p = ${P_out}
T = T
fp = sodium
[]
[h_ic]
type = SpecificEnthalpyFromPressureTemperatureIC
variable = h
p = ${P_out}
T = T
fp = sodium
[]
[mdot_ic]
type = ConstantIC
variable = mdot
value = 0.0
[]
[]
[AuxKernels]
[T_in_bc]
type = ConstantAux
variable = T
boundary = inlet
value = ${T_in}
execute_on = 'timestep_begin'
block = sub_channel
[]
[mdot_in_bc]
type = SCMMassFlowRateAux
variable = mdot
boundary = inlet
area = S
mass_flux = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
csv = true
[]
[Postprocessors]
[TTC-27]
type = SubChannelPointValue
variable = T
index = 91
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-28]
type = SubChannelPointValue
variable = T
index = 50
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-29]
type = SubChannelPointValue
variable = T
index = 21
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-30]
type = SubChannelPointValue
variable = T
index = 4
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-31]
type = SubChannelPointValue
variable = T
index = 2
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-32]
type = SubChannelPointValue
variable = T
index = 16
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-33]
type = SubChannelPointValue
variable = T
index = 42
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-34]
type = SubChannelPointValue
variable = T
index = 80
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-35]
type = SubChannelPointValue
variable = T
index = 107
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[MTC-20]
type = SubChannelPointValue
variable = T
index = 33
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-22]
type = SubChannelPointValue
variable = T
index = 3
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-24]
type = SubChannelPointValue
variable = T
index = 28
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-25]
type = SubChannelPointValue
variable = T
index = 60
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[MTC-26]
type = SubChannelPointValue
variable = T
index = 106
execute_on = 'TIMESTEP_END'
height = 0.172
[]
[14TC-37]
type = SubChannelPointValue
variable = T
index = 52
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[14TC-39]
type = SubChannelPointValue
variable = T
index = 6
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[14TC-41]
type = SubChannelPointValue
variable = T
index = 40
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[14TC-43]
type = SubChannelPointValue
variable = T
index = 105
execute_on = 'TIMESTEP_END'
height = 0.480
[]
[]
[Executioner]
type = Steady
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = '3d_SCM_SS.i'
execute_on = 'FINAL'
[]
[]
[Transfers]
[subchannel_transfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu S'
[]
[pin_transfer]
type = SCMPinSolutionTransfer
to_multi_app = viz
variable = 'Tpin q_prime'
[]
[]