- CT1Turbulent momentum, modeling parameter [-].
Default:1
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Turbulent momentum, modeling parameter [-].
SCMMixingChengTodreas
Class that models the turbulent mixing coefficient for wire-wrapped triangular assemblies using the Cheng Todreas correlations.
Overview
This closure class is used to model the turbulent mixing coefficient using the Cheng and Todreas correlations. Specifically this closure model applies to triangular assemblies with wire-wrapped pins. The implementation was based on:
Hydrodynamic models and correlations for bare and wire-wrapped hexagonal rod bundles—bundle friction factors, subchannel friction factors and mixing parameters, Cheng and Todreas Cheng and Todreas (1986).
The implementation separates the two Cheng-Todreas uses of :
interior gaps use the base turbulent mixing parameter in the global turbulent crossflow relation ;
edge/corner gaps return a sweep-flow parameter only when the subchannel enthalpy equation asks for
sweep_flow = true; this sweep-flow term is applied separately in the triangular-assembly energy equation and is not added to the base turbulent crossflow parameter.
The closure flags a solution warning when , , number of pins, or is outside the data range used for the Cheng-Todreas wire-wrapped mixing correlation.
In the intermittent regime, the original Cheng-Todreas treatment has been simplified in this implementation. The interpolation factor is evaluated as
using the bulk transition limits
These bulk and values are used for both the base turbulent mixing parameter and the peripheral sweep-flow parameter.
Information about the use of can be found in Turbulent crossflow. Additionally, the user may opt to provide the turbulent momentum mixing parameter CT. Information about the use of this parameter can be found in Turbulent momentum transfer.
Input 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.
- enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Controllable:Yes
Description:Set the enabled status of the MooseObject.
Advanced Parameters
- prop_getter_suffixAn optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
C++ Type:MaterialPropertyName
Unit:(no unit assumed)
Controllable:No
Description:An optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
- use_interpolated_stateFalseFor the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.
Default:False
C++ Type:bool
Controllable:No
Description:For the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.
Material Property Retrieval Parameters
Input Files
- (modules/subchannel/validation/Blockage/THORS/FFM-3A.i)
- (modules/subchannel/validation/ORNL_19_pin/test_ORNL_19.i)
- (modules/subchannel/validation/areva_FCTF/FCTF_deformed.i)
- (modules/subchannel/test/tests/problems/deformation/tri_pin_diameter.i)
- (modules/subchannel/test/tests/problems/SFR/sodium-19pin/test19_implicit.i)
- (modules/subchannel/validation/Toshiba_37_pin/toshiba_37_pin.i)
- (modules/subchannel/validation/areva_FCTF/FCTF_non_deformed.i)
- (modules/subchannel/validation/EBR-II/XX09_SCM_SS17_corrected.i)
- (modules/subchannel/validation/EBR-II/XX09_SCM_SS17.i)
- (modules/subchannel/test/tests/problems/SFR/EBR-II/XX09_SS_SHRT17.i)
- (modules/subchannel/validation/EBR-II/XX09_SCM_TR45R.i)
- (modules/subchannel/validation/Blockage/THORS/FFM-5B_low.i)
- (modules/subchannel/test/tests/problems/SFR/sodium-19pin/test19_explicit.i)
- (modules/subchannel/test/tests/positions/pin_positions.i)
- (modules/subchannel/test/tests/SCMTriPower/test_with_pins.i)
- (modules/subchannel/validation/EBR-II/XX09_SCM_SS45R_corrected.i)
- (modules/subchannel/validation/Blockage/THORS/FFM-5B_high.i)
- (modules/subchannel/examples/duct/test.i)
- (modules/subchannel/validation/EBR-II/XX09_SCM_TR17.i)
- (modules/subchannel/test/tests/problems/heat_transfer_correlations/XX09_SCM_SS17.i)
- (modules/combined/test/tests/subchannel_thm_coupling/subchannel.i)
- (modules/subchannel/test/tests/SCMTriPower/test.i)
- (modules/subchannel/test/tests/problems/SFR/sodium-19pin/test19_monolithic.i)
- (modules/subchannel/validation/EBR-II/XX09_SCM_SS45R.i)
- (modules/subchannel/examples/MultiApp/fuel_assembly.i)
References
- Shih-Kuei Cheng and Neil E Todreas.
Hydrodynamic models and correlations for bare and wire-wrapped hexagonal rod bundles—bundle friction factors, subchannel friction factors and mixing parameters.
Nuclear engineering and design, 92(2):227–251, 1986.[BibTeX]
@article{cheng1986hydrodynamic, author = "Cheng, Shih-Kuei and Todreas, Neil E", title = "Hydrodynamic models and correlations for bare and wire-wrapped hexagonal rod bundles—bundle friction factors, subchannel friction factors and mixing parameters", journal = "Nuclear engineering and design", volume = "92", number = "2", pages = "227--251", year = "1986", publisher = "Elsevier" }
(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 = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Executioner]
type = Steady
[]
[Postprocessors]
[1]
type = SubChannelPointValue
variable = T
index = 37
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[2]
type = SubChannelPointValue
variable = T
index = 36
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[3]
type = SubChannelPointValue
variable = T
index = 20
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[4]
type = SubChannelPointValue
variable = T
index = 10
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[5]
type = SubChannelPointValue
variable = T
index = 4
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[6]
type = SubChannelPointValue
variable = T
index = 1
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[7]
type = SubChannelPointValue
variable = T
index = 14
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[8]
type = SubChannelPointValue
variable = T
index = 28
execute_on = 'TIMESTEP_END'
height = 0.9144
[]
[]
(modules/subchannel/validation/ORNL_19_pin/test_ORNL_19.i)
# M. Fontana, et al,
# "Temperature distribution in the duct wall and at the exit of a 19-pin simulated lmfbr fuel assembly (ffm bundle 2a),
# "Nuclear Technology, vol. 24, no. 2, pp. 176-200, 1974.
T_in = 588.5
A12 = 1.00423e3
A13 = -0.21390
A14 = -1.1046e-5
rho = '${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/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 = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
!include deformed_duct_pp.i
[Executioner]
type = Steady
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = '3D.i'
execute_on = 'FINAL'
[]
[]
[Transfers]
[subchannel_transfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu S displacement'
[]
[pin_transfer]
type = SCMPinSolutionTransfer
to_multi_app = viz
variable = 'Dpin Tpin q_prime'
[]
[]
(modules/subchannel/test/tests/problems/deformation/tri_pin_diameter.i)
T_in = 588.5
P_out = 2.0e5
flow_area = 0.0004980799633447909
mass_flux_in = '${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 = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Postprocessors]
[S_deformed]
type = SubChannelPointValue
variable = S
index = 0
height = 0.25
execute_on = 'timestep_end'
[]
[w_perim_deformed]
type = SubChannelPointValue
variable = w_perim
index = 0
height = 0.25
execute_on = 'timestep_end'
[]
[]
[Executioner]
type = Steady
[]
[Outputs]
console = true
csv = true
[]
(modules/subchannel/test/tests/problems/SFR/sodium-19pin/test19_implicit.i)
T_in = 660
mass_flux_in = '${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 = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Postprocessors]
[T1]
type = SubChannelPointValue
variable = T
index = 37
execute_on = "timestep_end"
height = 0.5
[]
[T2]
type = SubChannelPointValue
variable = T
index = 36
execute_on = "timestep_end"
height = 0.5
[]
[T3]
type = SubChannelPointValue
variable = T
index = 20
execute_on = "timestep_end"
height = 0.5
[]
[T4]
type = SubChannelPointValue
variable = T
index = 10
execute_on = "timestep_end"
height = 0.5
[]
[T5]
type = SubChannelPointValue
variable = T
index = 4
execute_on = "timestep_end"
height = 0.5
[]
[T6]
type = SubChannelPointValue
variable = T
index = 1
execute_on = "timestep_end"
height = 0.5
[]
[T7]
type = SubChannelPointValue
variable = T
index = 14
execute_on = "timestep_end"
height = 0.5
[]
[T8]
type = SubChannelPointValue
variable = T
index = 28
execute_on = "timestep_end"
height = 0.5
[]
####### Assembly pressure drop
[DP_SubchannelDelta]
type = SubChannelDelta
variable = P
execute_on = 'TIMESTEP_END'
[]
#####
[Mean_Temp]
type = SCMPlanarMean
variable = T
height = 2
[]
[mdot-8]
type = SubChannelPointValue
variable = mdot
index = 28
execute_on = 'TIMESTEP_END'
height = 0.5
[]
[Total_power]
type = ElementIntegralVariablePostprocessor
variable = q_prime
block = sub_channel
[]
[Total_power_SCMDuctPowerPostprocessor]
type = SCMDuctHeatRatePostprocessor
[]
[Total_power_SCMTHPowerPostprocessor]
type = SCMTHPowerPostprocessor
[]
[]
[Executioner]
type = Steady
[]
(modules/subchannel/validation/Toshiba_37_pin/toshiba_37_pin.i)
T_in = 660
# [1e+6 kg/m^2-hour] turns into kg/m^2-sec
mass_flux_in = '${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/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 = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
!include non_deformed_duct_pp.i
[Executioner]
type = Steady
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = '3D.i'
execute_on = 'FINAL'
[]
[]
[Transfers]
[subchannel_transfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu S displacement'
[]
[pin_transfer]
type = SCMPinSolutionTransfer
to_multi_app = viz
variable = 'Dpin Tpin q_prime'
[]
[]
(modules/subchannel/validation/EBR-II/XX09_SCM_SS17_corrected.i)
# Following Benchmark Specifications and Data Requirements for EBR-II Shutdown Heat Removal Tests SHRT-17 and SHRT-45R
# Available at: https://publications.anl.gov/anlpubs/2012/06/73647.pdf
###################################################
# Steady state subchannel calculation
# Thermal-hydraulics parameters
###################################################
T_in = 624.70556 #Kelvin
Total_Surface_Area = 0.000854322 #m2
Mass_In = 2.45 #kg/sec
mass_flux_in = '${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/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'
[]
[]
(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 = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Postprocessors]
[TTC-27]
type = SubChannelPointValue
variable = T
index = 91
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-28]
type = SubChannelPointValue
variable = T
index = 50
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-29]
type = SubChannelPointValue
variable = T
index = 21
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-30]
type = SubChannelPointValue
variable = T
index = 4
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-31]
type = SubChannelPointValue
variable = T
index = 2
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-32]
type = SubChannelPointValue
variable = T
index = 16
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-33]
type = SubChannelPointValue
variable = T
index = 42
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-34]
type = SubChannelPointValue
variable = T
index = 80
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[TTC-35]
type = SubChannelPointValue
variable = T
index = 107
execute_on = 'TIMESTEP_END'
height = 0.322
[]
####### Assembly pressure drop
[DP_SubchannelDelta]
type = SubChannelDelta
variable = P
execute_on = 'TIMESTEP_END'
[]
#####
[Mean_Temp]
type = SCMPlanarMean
variable = T
height = 2
[]
#####
[mdot-35]
type = SubChannelPointValue
variable = mdot
index = 107
execute_on = 'TIMESTEP_END'
height = 0.322
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Executioner]
type = Steady
[]
(modules/subchannel/validation/EBR-II/XX09_SCM_TR45R.i)
# Following Benchmark Specifications and Data Requirements for EBR-II Shutdown Heat Removal Tests SHRT-17 and SHRT-45R
# Available at: https://publications.anl.gov/anlpubs/2012/06/73647.pdf
# Transient subchannel calculation
###################################################
# Thermal-hydraulics parameters
###################################################
T_in = 616.4 #Kelvin
Total_Surface_Area = 0.000854322 #m3
mass_flux_in = '${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/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 = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[q_prime_Aux]
type = SCMTriPowerAux
variable = q_prime
power = 52800 #W, low flow case
filename = "pin_power_profile_19.txt"
execute_on = 'initial timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Postprocessors]
[1]
type = SubChannelPointValue
variable = T
index = 34
execute_on = 'initial timestep_end'
height = 0.94
[]
[2]
type = SubChannelPointValue
variable = T
index = 33
execute_on = 'initial timestep_end'
height = 0.94
[]
[3]
type = SubChannelPointValue
variable = T
index = 18
execute_on = 'initial timestep_end'
height = 0.94
[]
[4]
type = SubChannelPointValue
variable = T
index = 9
execute_on = 'initial timestep_end'
height = 0.94
[]
[5]
type = SubChannelPointValue
variable = T
index = 3
execute_on = 'initial timestep_end'
height = 0.94
[]
[6]
type = SubChannelPointValue
variable = T
index = 0
execute_on = 'initial timestep_end'
height = 0.94
[]
[7]
type = SubChannelPointValue
variable = T
index = 12
execute_on = 'initial timestep_end'
height = 0.94
[]
[8]
type = SubChannelPointValue
variable = T
index = 25
execute_on = 'initial timestep_end'
height = 0.94
[]
[]
[Executioner]
type = Steady
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = "FFM-5B_viz.i"
execute_on = "timestep_end"
[]
[]
[Transfers]
[xfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu q_prime S w_perim'
[]
[]
(modules/subchannel/test/tests/problems/SFR/sodium-19pin/test19_explicit.i)
T_in = 660
mass_flux_in = '${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 = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Postprocessors]
[T1]
type = SubChannelPointValue
variable = T
index = 37
execute_on = "timestep_end"
height = 0.5
[]
[T2]
type = SubChannelPointValue
variable = T
index = 36
execute_on = "timestep_end"
height = 0.5
[]
[T3]
type = SubChannelPointValue
variable = T
index = 20
execute_on = "timestep_end"
height = 0.5
[]
[T4]
type = SubChannelPointValue
variable = T
index = 10
execute_on = "timestep_end"
height = 0.5
[]
[T5]
type = SubChannelPointValue
variable = T
index = 4
execute_on = "timestep_end"
height = 0.5
[]
[T6]
type = SubChannelPointValue
variable = T
index = 1
execute_on = "timestep_end"
height = 0.5
[]
[T7]
type = SubChannelPointValue
variable = T
index = 14
execute_on = "timestep_end"
height = 0.5
[]
[T8]
type = SubChannelPointValue
variable = T
index = 28
execute_on = "timestep_end"
height = 0.5
[]
####### Assembly pressure drop
[DP_SubchannelDelta]
type = SubChannelDelta
variable = P
execute_on = 'TIMESTEP_END'
[]
#####
[Mean_Temp]
type = SCMPlanarMean
variable = T
height = 2
[]
[Total_power]
type = ElementIntegralVariablePostprocessor
variable = q_prime
block = sub_channel
[]
[mdot-8]
type = SubChannelPointValue
variable = mdot
index = 28
execute_on = 'TIMESTEP_END'
height = 0.5
[]
[]
[Executioner]
type = Steady
[]
(modules/subchannel/test/tests/positions/pin_positions.i)
###################################################
# Thermal-hydraulics parameters
###################################################
P_out = 758423 # Pa
###################################################
# Geometric parameters
###################################################
n_cells = 50
# units are cm - do not forget to convert to meter
scale_factor = 0.01
fuel_element_pitch = '${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 = ${P_out}
solve = false
# Solver parameters
n_blocks = 10
implicit = false
segregated = true
staggered_pressure = false
# Tolerances
P_tol = 1.0e-4
T_tol = 1.0e-8
# Output
compute_density = true
compute_viscosity = true
compute_power = true
verbose_multiapps = true
verbose_subchannel = false
# friction model
friction_closure = 'cheng'
# HTC
pin_HTC_closure = Dittus-Boelter
duct_HTC_closure = Dittus-Boelter
# mixing model (beta)
mixing_closure = 'cheng_todreas'
[]
[SCMClosures]
[Cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[Dittus-Boelter]
type = SCMHTCDittusBoelter
[]
[cheng_todreas]
type = SCMMixingChengTodreas
[]
[]
[SCMClosures]
[cheng]
type = SCMFrictionUpdatedChengTodreas
[]
[]
[Executioner]
type = Steady
[]
[Positions]
[pin_positions]
type = SCMPinPositions
outputs = json
[]
[]
[Outputs]
json = true
[]
(modules/subchannel/test/tests/SCMTriPower/test_with_pins.i)
T_in = 588.5
flow_area = 0.0004980799633447909 #m2
mass_flux_in = '${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 = ${fparse num_cells + 1}
[]
[]
[Outputs]
csv = true
[]
(modules/subchannel/validation/EBR-II/XX09_SCM_SS45R_corrected.i)
# Following Benchmark Specifications and Data Requirements for EBR-II Shutdown Heat Removal Tests SHRT-17 and SHRT-45R
# Available at: https://publications.anl.gov/anlpubs/2012/06/73647.pdf
###################################################
# Steady state subchannel calculation
# Thermal-hydraulics parameters
###################################################
T_in = 616.4 #Kelvin
Total_Surface_Area = 0.000854322 #m2
Mass_In = 2.427 #kg/sec
mass_flux_in = '${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_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 = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Postprocessors]
[1]
type = SubChannelPointValue
variable = T
index = 34
execute_on = 'initial timestep_end'
height = 0.94
[]
[2]
type = SubChannelPointValue
variable = T
index = 33
execute_on = 'initial timestep_end'
height = 0.94
[]
[3]
type = SubChannelPointValue
variable = T
index = 18
execute_on = 'initial timestep_end'
height = 0.94
[]
[4]
type = SubChannelPointValue
variable = T
index = 9
execute_on = 'initial timestep_end'
height = 0.94
[]
[5]
type = SubChannelPointValue
variable = T
index = 3
execute_on = 'initial timestep_end'
height = 0.94
[]
[6]
type = SubChannelPointValue
variable = T
index = 0
execute_on = 'initial timestep_end'
height = 0.94
[]
[7]
type = SubChannelPointValue
variable = T
index = 12
execute_on = 'initial timestep_end'
height = 0.94
[]
[8]
type = SubChannelPointValue
variable = T
index = 25
execute_on = 'initial timestep_end'
height = 0.94
[]
[]
[Executioner]
type = Steady
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = "FFM-5B_viz.i"
execute_on = "timestep_end"
[]
[]
[Transfers]
[xfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P DP h T rho mu q_prime S w_perim'
[]
[]
(modules/subchannel/examples/duct/test.i)
T_in = 660
mass_flux_in = '${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/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/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 = ${fparse heated_length*0.99}
[]
[]
[Executioner]
type = Steady
[]
(modules/combined/test/tests/subchannel_thm_coupling/subchannel.i)
# Based on M. Fontana, et al. this arbitrary subassembly is used for THM-SC coupling
T_in = 583.0 #K
flow_area = 0.0004980799633447909 #m2
mass_flux_in = '${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 = ${P_out}
[]
[]
################################################################################
# A multiapp that projects data to a detailed mesh
################################################################################
[MultiApps]
[viz]
type = FullSolveMultiApp
input_files = '3D.i'
execute_on = 'FINAL'
[]
[]
[Transfers]
[subchannel_transfer]
type = SCMSolutionTransfer
to_multi_app = viz
variable = 'mdot SumWij P h T rho mu S'
[]
[pin_transfer]
type = SCMPinSolutionTransfer
to_multi_app = viz
variable = 'Dpin Tpin q_prime'
[]
[]
(modules/subchannel/test/tests/SCMTriPower/test.i)
T_in = 588.5
flow_area = 0.0004980799633447909 #m2
mass_flux_in = '${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 = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[q_prime_AUX]
type = SCMTriPowerAux
variable = q_prime_aux
power = 20000 # W
filename = "pin_power_profile.txt" #type in name of file that describes radial power profile
# axial_heat_rate = axial_heat_rate
execute_on = 'initial'
[]
[]
[Executioner]
type = Steady
[]
[Postprocessors]
[Total_power_IC_defaultPP]
type = ElementIntegralVariablePostprocessor
variable = q_prime
[]
[Total_power_Aux_defaultPP]
type = ElementIntegralVariablePostprocessor
variable = q_prime_aux
[]
[Total_power_SCMPinPowerPostprocessor]
type = SCMPinPowerPostprocessor
[]
[Total_power_SCMTHPowerPostprocessor]
type = SCMTHPowerPostprocessor
[]
[]
[Outputs]
csv = true
[]
(modules/subchannel/test/tests/problems/SFR/sodium-19pin/test19_monolithic.i)
T_in = 660
mass_flux_in = '${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 = ${mass_flux_in}
execute_on = 'timestep_begin'
[]
[]
[Outputs]
exodus = true
csv = true
[]
[Postprocessors]
[T1]
type = SubChannelPointValue
variable = T
index = 37
execute_on = "timestep_end"
height = 0.5
[]
[T2]
type = SubChannelPointValue
variable = T
index = 36
execute_on = "timestep_end"
height = 0.5
[]
[T3]
type = SubChannelPointValue
variable = T
index = 20
execute_on = "timestep_end"
height = 0.5
[]
[T4]
type = SubChannelPointValue
variable = T
index = 10
execute_on = "timestep_end"
height = 0.5
[]
[T5]
type = SubChannelPointValue
variable = T
index = 4
execute_on = "timestep_end"
height = 0.5
[]
[T6]
type = SubChannelPointValue
variable = T
index = 1
execute_on = "timestep_end"
height = 0.5
[]
[T7]
type = SubChannelPointValue
variable = T
index = 14
execute_on = "timestep_end"
height = 0.5
[]
[T8]
type = SubChannelPointValue
variable = T
index = 28
execute_on = "timestep_end"
height = 0.5
[]
####### Assembly pressure drop
[DP_SubchannelDelta]
type = SubChannelDelta
variable = P
execute_on = 'TIMESTEP_END'
[]
#####
[Mean_Temp]
type = SCMPlanarMean
variable = T
height = 2
[]
[Total_power]
type = ElementIntegralVariablePostprocessor
variable = q_prime
block = sub_channel
[]
[mdot-8]
type = SubChannelPointValue
variable = mdot
index = 28
execute_on = 'TIMESTEP_END'
height = 0.5
[]
[]
[Executioner]
type = Steady
[]
(modules/subchannel/validation/EBR-II/XX09_SCM_SS45R.i)
# Following Benchmark Specifications and Data Requirements for EBR-II Shutdown Heat Removal Tests SHRT-17 and SHRT-45R
# Available at: https://publications.anl.gov/anlpubs/2012/06/73647.pdf
###################################################
# Steady state subchannel calculation
# Thermal-hydraulics parameters
###################################################
T_in = 616.4 #Kelvin
Total_Surface_Area = 0.000854322 #m2
Mass_In = 2.427 #kg/sec
mass_flux_in = '${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/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'
[]
[]