SideSetHeatTransferKernel

Modeling conduction, convection, and radiation across internal side set.

Description

This kernel models the heat transfer across a side set using all three heat transfer mechanisms. The purpose is to model the heat transfer across a small gap without modeling the gap itself. The heat transfer mechanisms for each side of the gap are described by the following equations: where the and indices indicate the primary and neighbor side of the boundary, respectively.

- is the gap conductance typically defined as conductivity divided by gap width: conductance

- is the convective heat transfer coefficient: h_primary/h_neighbor

- is the bulk temperature of the gap, either defined by a material property or variable: Tbulk_mat or Tbulk_var

- is the effective emissivity: emissivity_eff_primary/emissivity_eff_neighbor

Example Input File Syntax

Using material properties generated from SideSetHeatTransferMaterial:

[InterfaceKernels]
  [gap]
    type = SideSetHeatTransferKernel
    variable = T
    neighbor_var = T
    boundary = 'interface0'
  []
[]
(moose/modules/heat_transfer/test/tests/sideset_heat_transfer/gap_thermal_1D.i)

Using bulk gap temperature (for convection) as auxiliary variable:

[InterfaceKernels]
  [gap_var]
    type = SideSetHeatTransferKernel
    variable = T
    neighbor_var = T
    boundary = 'interface0'
    Tbulk_var = Tbulk
  []
[]
(moose/modules/heat_transfer/test/tests/sideset_heat_transfer/gap_thermal_1D.i)

Input Parameters

  • neighbor_varThe variable on the other side of the interface.

    C++ Type:std::vector<VariableName>

    Unit:(no unit assumed)

    Controllable:No

    Description:The variable on the other side of the interface.

  • variableThe name of the variable that this residual object operates on

    C++ Type:NonlinearVariableName

    Unit:(no unit assumed)

    Controllable:No

    Description:The name of the variable that this residual object operates on

Required Parameters

  • Tbulk_matgap_TbulkBulk temperature of gap as material property

    Default:gap_Tbulk

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:Bulk temperature of gap as material property

  • Tbulk_varBulk temperature of gap as variable

    C++ Type:std::vector<VariableName>

    Unit:(no unit assumed)

    Controllable:No

    Description:Bulk temperature of gap as variable

  • boundaryThe list of boundaries (ids or names) from the mesh where this object applies

    C++ Type:std::vector<BoundaryName>

    Unit:(no unit assumed)

    Controllable:No

    Description:The list of boundaries (ids or names) from the mesh where this object applies

  • conductancegap_conductanceConductivity of gap divided by effective gap width,conductance ignored if not provided

    Default:gap_conductance

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:Conductivity of gap divided by effective gap width,conductance ignored if not provided

  • emissivity_eff_neighborgap_emissivity_eff_neighborEffective emmissivity of neighbor face, radiation ignored if not provided. This value contains contributions from reflectivity, see SideSetHeatTransferMaterial for details.

    Default:gap_emissivity_eff_neighbor

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:Effective emmissivity of neighbor face, radiation ignored if not provided. This value contains contributions from reflectivity, see SideSetHeatTransferMaterial for details.

  • emissivity_eff_primarygap_emissivity_eff_primaryEffective emmissivity of primary face, radiation ignored if not provided. This value contains contributions from reflectivity, see SideSetHeatTransferMaterial for details.

    Default:gap_emissivity_eff_primary

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:Effective emmissivity of primary face, radiation ignored if not provided. This value contains contributions from reflectivity, see SideSetHeatTransferMaterial for details.

  • h_neighborgap_h_neighborConvective heat transfer coefficient (neighbor face), convection ignored if not provided

    Default:gap_h_neighbor

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:Convective heat transfer coefficient (neighbor face), convection ignored if not provided

  • h_primarygap_h_primaryConvective heat transfer coefficient (primary face), convection ignored if not provided

    Default:gap_h_primary

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:Convective heat transfer coefficient (primary face), convection ignored if not provided

  • 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

    Unit:(no unit assumed)

    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.

Optional Parameters

  • absolute_value_vector_tagsThe tags for the vectors this residual object should fill with the absolute value of the residual contribution

    C++ Type:std::vector<TagName>

    Unit:(no unit assumed)

    Controllable:No

    Description:The tags for the vectors this residual object should fill with the absolute value of the residual contribution

  • extra_matrix_tagsThe extra tags for the matrices this Kernel should fill

    C++ Type:std::vector<TagName>

    Unit:(no unit assumed)

    Controllable:No

    Description:The extra tags for the matrices this Kernel should fill

  • extra_vector_tagsThe extra tags for the vectors this Kernel should fill

    C++ Type:std::vector<TagName>

    Unit:(no unit assumed)

    Controllable:No

    Description:The extra tags for the vectors this Kernel should fill

  • matrix_tagssystemThe tag for the matrices this Kernel should fill

    Default:system

    C++ Type:MultiMooseEnum

    Unit:(no unit assumed)

    Options:nontime, system

    Controllable:No

    Description:The tag for the matrices this Kernel should fill

  • vector_tagsnontimeThe tag for the vectors this Kernel should fill

    Default:nontime

    C++ Type:MultiMooseEnum

    Unit:(no unit assumed)

    Options:nontime, time

    Controllable:No

    Description:The tag for the vectors this Kernel should fill

Tagging Parameters

  • control_tagsAdds user-defined labels for accessing object parameters via control logic.

    C++ Type:std::vector<std::string>

    Unit:(no unit assumed)

    Controllable:No

    Description:Adds user-defined labels for accessing object parameters via control logic.

  • diag_save_inThe name of auxiliary variables to save this Kernel's diagonal Jacobian contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)

    C++ Type:std::vector<AuxVariableName>

    Unit:(no unit assumed)

    Controllable:No

    Description:The name of auxiliary variables to save this Kernel's diagonal Jacobian contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)

  • diag_save_in_var_sideThis parameter must exist if diag_save_in variables are specified and must have the same length as diag_save_in. This vector specifies whether the corresponding aux_var should save-in jacobian contributions from the primary ('p') or secondary side ('s').

    C++ Type:MultiMooseEnum

    Unit:(no unit assumed)

    Options:m, s

    Controllable:No

    Description:This parameter must exist if diag_save_in variables are specified and must have the same length as diag_save_in. This vector specifies whether the corresponding aux_var should save-in jacobian contributions from the primary ('p') or secondary side ('s').

  • enableTrueSet the enabled status of the MooseObject.

    Default:True

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:Yes

    Description:Set the enabled status of the MooseObject.

  • implicitTrueDetermines whether this object is calculated using an implicit or explicit form

    Default:True

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:No

    Description:Determines whether this object is calculated using an implicit or explicit form

  • save_inThe name of auxiliary variables to save this Kernel's residual contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)

    C++ Type:std::vector<AuxVariableName>

    Unit:(no unit assumed)

    Controllable:No

    Description:The name of auxiliary variables to save this Kernel's residual contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)

  • save_in_var_sideThis parameter must exist if save_in variables are specified and must have the same length as save_in. This vector specifies whether the corresponding aux_var should save-in residual contributions from the primary ('p') or secondary side ('s').

    C++ Type:MultiMooseEnum

    Unit:(no unit assumed)

    Options:m, s

    Controllable:No

    Description:This parameter must exist if save_in variables are specified and must have the same length as save_in. This vector specifies whether the corresponding aux_var should save-in residual contributions from the primary ('p') or secondary side ('s').

  • seed0The seed for the master random number generator

    Default:0

    C++ Type:unsigned int

    Unit:(no unit assumed)

    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

    Unit:(no unit assumed)

    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

References

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