GapHeatTransfer

Transfers heat across a gap between two surfaces dependent on the gap geometry specified.

Description

GapHeatTransfer calculates the amount of heat transferred across unmeshed gaps between two different blocks.

The quadrature option is generally recommended for most models. With this option, heat flux is computed and applied as an integrated boundary condition at the quadrature points on both faces. Use of the quadrature options generally gives smoother results, although there can be small differences in the heat flux on the two surfaces.

It is also important to use the appropriate gap_geometry_type parameter (PLATE, CYLINDER, or SPHERE) for the model geometry.

Two-dimensional Cartesian geometries are not restricted to be in or parallel to the X-Y coordinate plane.

Example Input syntax

[ThermalContact]
  [./left_to_right]
    emissivity_primary = 0
    emissivity_secondary = 0
    secondary = leftright
    quadrature = true
    primary = rightleft
    variable = temp
    type = GapHeatTransfer
  [../]
[]
(moose/modules/heat_transfer/test/tests/heat_conduction/2d_quadrature_gap_heat_transfer/nonmatching.i)

Input Parameters

  • boundaryThe list of boundary IDs from the mesh where this object applies

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

    Unit:(no unit assumed)

    Controllable:No

    Description:The list of boundary IDs from the mesh where this object applies

  • 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

  • appended_property_nameName appended to material properties to make them unique

    C++ Type:std::string

    Unit:(no unit assumed)

    Controllable:No

    Description:Name appended to material properties to make them unique

  • cylinder_axis_point_1Start point for line defining cylindrical axis

    C++ Type:libMesh::VectorValue<double>

    Unit:(no unit assumed)

    Controllable:No

    Description:Start point for line defining cylindrical axis

  • cylinder_axis_point_2End point for line defining cylindrical axis

    C++ Type:libMesh::VectorValue<double>

    Unit:(no unit assumed)

    Controllable:No

    Description:End point for line defining cylindrical axis

  • displacementsThe displacements appropriate for the simulation geometry and coordinate system

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

    Unit:(no unit assumed)

    Controllable:No

    Description:The displacements appropriate for the simulation geometry and coordinate system

  • gap_distanceDistance across the gap

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

    Unit:(no unit assumed)

    Controllable:No

    Description:Distance across the gap

  • gap_geometry_typeGap calculation type. Choices are: PLATE CYLINDER SPHERE

    C++ Type:MooseEnum

    Unit:(no unit assumed)

    Options:PLATE, CYLINDER, SPHERE

    Controllable:No

    Description:Gap calculation type. Choices are: PLATE CYLINDER SPHERE

  • gap_tempTemperature on the other side of the gap

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

    Unit:(no unit assumed)

    Controllable:No

    Description:Temperature on the other side of the gap

  • max_gap1e+06A maximum gap size

    Default:1e+06

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:A maximum gap size

  • min_gap1e-06A minimum gap size

    Default:1e-06

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:A minimum gap size

  • min_gap_order0Order of the Taylor expansion below min_gap

    Default:0

    C++ Type:unsigned int

    Unit:(no unit assumed)

    Controllable:No

    Description:Order of the Taylor expansion below min_gap

  • orderFIRSTThe finite element order

    Default:FIRST

    C++ Type:MooseEnum

    Unit:(no unit assumed)

    Options:CONSTANT, FIRST, SECOND, THIRD, FOURTH

    Controllable:No

    Description:The finite element order

  • paired_boundaryThe boundary to be penetrated

    C++ Type:BoundaryName

    Unit:(no unit assumed)

    Controllable:No

    Description:The boundary to be penetrated

  • 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.

  • quadratureFalseWhether or not to do Quadrature point based gap heat transfer. If this is true then gap_distance and gap_temp should NOT be provided (and will be ignored) however paired_boundary IS then required.

    Default:False

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:No

    Description:Whether or not to do Quadrature point based gap heat transfer. If this is true then gap_distance and gap_temp should NOT be provided (and will be ignored) however paired_boundary IS then required.

  • sphere_originOrigin for sphere geometry

    C++ Type:libMesh::VectorValue<double>

    Unit:(no unit assumed)

    Controllable:No

    Description:Origin for sphere geometry

  • 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.

  • warningsFalseWhether to output warning messages concerning nodes not being found

    Default:False

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:No

    Description:Whether to output warning messages concerning nodes not being found

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 BC'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 BC's diagonal jacobian contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)

  • 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 BC'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 BC's residual contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)

  • 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