ThermalFunctionSolidProperties

Function-based thermal properties.

Description

This userobject provides thermal properties for an arbitrary solid as a function of temperature. Parsed function inputs are provided for density, thermal conductivity, and specific heat by parameterizing the time variable t as temperature. This userobject can also be used to specify constant properties by excluding any dependence on temperature.

Range of Validity

The range of validity of this userobject depends on the correlations provided by the user. Note that arbitrary units can be specified with this userobject as long as they are consistent with the units of the other objects (e.g. kernels, boundary conditions, etc.) where the userobject functions are used.

Input Parameters

cpIsobaric specific heat
C++ Type:FunctionName
Controllable:No
Description:Isobaric specific heat
kThermal conductivity
C++ Type:FunctionName
Controllable:No
Description:Thermal conductivity
rhoDensity
C++ Type:FunctionName
Controllable:No
Description:Density

Required Parameters

allow_imperfect_jacobiansFalsetrue to allow unimplemented property derivative terms to be set to zero for the AD API
Default:False
C++ Type:bool
Controllable:No
Description:true to allow unimplemented property derivative terms to be set to zero for the AD API
execute_onTIMESTEP_ENDThe list of flag(s) indicating when this object should be executed, the available options include FORWARD, ADJOINT, HOMOGENEOUS_FORWARD, ADJOINT_TIMESTEP_BEGIN, ADJOINT_TIMESTEP_END, NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, MULTIAPP_FIXED_POINT_END, MULTIAPP_FIXED_POINT_BEGIN, FINAL, CUSTOM, ALWAYS.
Default:TIMESTEP_END
C++ Type:ExecFlagEnum
Options:FORWARD, ADJOINT, HOMOGENEOUS_FORWARD, ADJOINT_TIMESTEP_BEGIN, ADJOINT_TIMESTEP_END, NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, MULTIAPP_FIXED_POINT_END, MULTIAPP_FIXED_POINT_BEGIN, FINAL, CUSTOM, ALWAYS
Controllable:No
Description:The list of flag(s) indicating when this object should be executed, the available options include FORWARD, ADJOINT, HOMOGENEOUS_FORWARD, ADJOINT_TIMESTEP_BEGIN, ADJOINT_TIMESTEP_END, NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, MULTIAPP_FIXED_POINT_END, MULTIAPP_FIXED_POINT_BEGIN, FINAL, CUSTOM, ALWAYS.
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
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.

Optional Parameters

allow_duplicate_execution_on_initialFalseIn the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).
Default:False
C++ Type:bool
Controllable:No
Description:In the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).
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.
execution_order_group0Execution order groups are executed in increasing order (e.g., the lowest number is executed first). Note that negative group numbers may be used to execute groups before the default (0) group. Please refer to the user object documentation for ordering of user object execution within a group.
Default:0
C++ Type:int
Controllable:No
Description:Execution order groups are executed in increasing order (e.g., the lowest number is executed first). Note that negative group numbers may be used to execute groups before the default (0) group. Please refer to the user object documentation for ordering of user object execution within a group.
force_postauxFalseForces the UserObject to be executed in POSTAUX
Default:False
C++ Type:bool
Controllable:No
Description:Forces the UserObject to be executed in POSTAUX
force_preauxFalseForces the UserObject to be executed in PREAUX
Default:False
C++ Type:bool
Controllable:No
Description:Forces the UserObject to be executed in PREAUX
force_preicFalseForces the UserObject to be executed in PREIC during initial setup
Default:False
C++ Type:bool
Controllable:No
Description:Forces the UserObject to be executed in PREIC during initial setup
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

Input Files

(modules/thermal_hydraulics/test/tests/components/heat_structure_cylindrical/phy.rz_mats.i)

References

No citations exist within this document.

(modules/thermal_hydraulics/test/tests/components/heat_structure_cylindrical/phy.rz_mats.i)

# Tests that cylindrical heat structure thermal properties can be defined in the Materials block

[Functions]
  [power_profile_fn]
    type = ParsedFunction
    expression = '1.570796326794897 * sin(x / 3.6576 * pi)'
  []
[]

[SolidProperties]
  [function_sp]
    type = ThermalFunctionSolidProperties
    rho = 6.6e1
    cp = 321.384
    k = 16.48672
  []
[]

[Materials]
  [fuel-mat]
    type = ADGenericConstantMaterial
    block = hs:FUEL
    prop_names = 'thermal_conductivity specific_heat density'
    prop_values = '3.65 288.734 1.0412e2'
  []

  [gap-mat]
    type = ADGenericConstantMaterial
    block = hs:GAP
    prop_names = 'thermal_conductivity specific_heat density'
    prop_values = '1.084498 1.0 1.0'
  []

  [clad-mat]
    type = ADConstantDensityThermalSolidPropertiesMaterial
    block = hs:CLAD
    sp = function_sp
    temperature = T_solid
    T_ref = 300
  []
[]

[Components]
  [reactor]
    type = TotalPower
    power = 296153.84615384615385
  []

  [hs]
    type = HeatStructureCylindrical
    position = '0 0 1'
    orientation = '1 0 0'

    length = 3.6576
    n_elems = 20
    names = 'FUEL GAP CLAD'
    widths = '0.0046955  0.0000955  0.000673'
    n_part_elems = '3 1 1'

    initial_T = 564.15
  []

  [hg]
    type = HeatSourceFromTotalPower
    hs = hs
    regions = 'FUEL'
    power_fraction = 3.33672612e-1
    power = reactor
    power_shape_function = power_profile_fn
  []

  [temp_outside]
    type = HSBoundarySpecifiedTemperature
    hs = hs
    boundary = hs:outer
    T = 600
  []
[]

[Preconditioning]
  [pc]
    type = SMP
    full = true
  []
[]

[Executioner]
  type = Transient
  scheme = 'bdf2'

  start_time = 0
  dt = 2
  num_steps = 10
  abort_on_solve_fail = true

  solve_type = 'NEWTON'
  nl_rel_tol = 1e-6
  nl_abs_tol = 1e-6
  nl_max_its = 30

  l_tol = 1e-4
  l_max_its = 300
[]


[Outputs]
  exodus = true
  [console]
    type = Console
    execute_scalars_on = none
  []
[]

Description
Range of Validity
Input Parameters
Input Files
References