SCMTriPowerAux

Computes axial power rate (W/m) that goes into the subchannel cells or is assigned to the fuel pins, in a triangular lattice arrangement

Overview

This AuxKernel does the same thing as the SCMTriPowerIC IC kernel, but is more versatile in the sense that it can populate q_prime not only during initialization but at multiple times during the solve.

Caveat

If the user has created a mesh for the pins, the axial heat rate q_prime will be assigned to the nodes of the pin mesh. If the user hasn't created a pin mesh the appropriate heat rate q_prime will be assigned to the nodes of the subchannel mesh.

Input Parameters

filenamename of radial power profile .txt file (should be a single column) [UnitLess].
C++ Type:std::string
Controllable:No
Description:name of radial power profile .txt file (should be a single column) [UnitLess].
powerThe postprocessor or Real to use for the total power of the subassembly [W]
C++ Type:PostprocessorName
Unit:(no unit assumed)
Controllable:No
Description:The postprocessor or Real to use for the total power of the subassembly [W]
variableThe name of the variable that this object applies to
C++ Type:AuxVariableName
Unit:(no unit assumed)
Controllable:No
Description:The name of the variable that this object applies to

Required Parameters

axial_heat_rate1.0user provided normalized function of axial heat rate [Unitless]. The integral over pin length should equal the heated length
Default:1.0
C++ Type:FunctionName
Unit:(no unit assumed)
Controllable:No
Description:user provided normalized function of axial heat rate [Unitless]. The integral over pin length should equal the heated length
blockThe list of blocks (ids or names) that this object will be applied
C++ Type:std::vector<SubdomainName>
Controllable:No
Description:The list of blocks (ids or names) that this object will be applied
boundaryThe list of boundaries (ids or names) from the mesh where this object applies
C++ Type:std::vector<BoundaryName>
Controllable:No
Description:The list of boundaries (ids or names) from the mesh where this object applies
check_boundary_restrictedTrueWhether to check for multiple element sides on the boundary in the case of a boundary restricted, element aux variable. Setting this to false will allow contribution to a single element's elemental value(s) from multiple boundary sides on the same element (example: when the restricted boundary exists on two or more sides of an element, such as at a corner of a mesh
Default:True
C++ Type:bool
Controllable:No
Description:Whether to check for multiple element sides on the boundary in the case of a boundary restricted, element aux variable. Setting this to false will allow contribution to a single element's elemental value(s) from multiple boundary sides on the same element (example: when the restricted boundary exists on two or more sides of an element, such as at a corner of a mesh
execute_onLINEAR TIMESTEP_ENDThe list of flag(s) indicating when this object should be executed. For a description of each flag, see https://mooseframework.inl.gov/source/interfaces/SetupInterface.html.
Default:LINEAR TIMESTEP_END
C++ Type:ExecFlagEnum
Options:XFEM_MARK, FORWARD, ADJOINT, HOMOGENEOUS_FORWARD, ADJOINT_TIMESTEP_BEGIN, ADJOINT_TIMESTEP_END, NONE, INITIAL, LINEAR, LINEAR_CONVERGENCE, NONLINEAR, NONLINEAR_CONVERGENCE, POSTCHECK, TIMESTEP_END, TIMESTEP_BEGIN, MULTIAPP_FIXED_POINT_END, MULTIAPP_FIXED_POINT_BEGIN, MULTIAPP_FIXED_POINT_CONVERGENCE, FINAL, CUSTOM, PRE_DISPLACE
Controllable:No
Description:The list of flag(s) indicating when this object should be executed. For a description of each flag, see https://mooseframework.inl.gov/source/interfaces/SetupInterface.html.

Optional 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.
seed0The seed for the master random number generator
Default:0
C++ Type:unsigned int
Controllable:No
Description:The seed for the master random number generator
use_displaced_meshFalseWhether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.
Default:False
C++ Type:bool
Controllable:No
Description:Whether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

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-5B_low.i)

(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]
  [subchannel]
    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
    spacer_z = '0.0'
    spacer_k = '0.0'
    z_blockage = '0.49 0.52'
    index_blockage = '29 31 30 32 34 33 35 15 16 8 17 18 9 19'
    reduction_blockage = '0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2'
    k_blockage = '1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 '

  []
[]

[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
  []
  [mu]
    block = subchannel
  []
  [q_prime]
    block = subchannel
  []
  [displacement]
    block = subchannel
  []
[]

[FluidProperties]
  [sodium]
    type = PBSodiumFluidProperties
  []
[]

[Problem]
  type = TriSubChannel1PhaseProblem
  fp = sodium
  n_blocks = 1
  P_out = 2.0e5
  CT = 2.2
  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'
[]

[ICs]
  [S_IC]
    type = SCMTriFlowAreaIC
    variable = S
  []

  [w_perim_IC]
    type = SCMTriWettedPerimIC
    variable = w_perim
  []

  [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 displacement w_perim'
  []
[]

Overview
Caveat
Input Parameters
Input Files