- 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
HeatConduction
Description
HeatConduction implements the diffusion kernel in the thermal energy conservation equation, with a material property for the diffusion coefficient. The strong form is
where is the diffusion coefficient (thermal conductivity) and is the variable (temperature). The corresponding weak form, in inner-product notation, is
where is the approximate solution and is a finite element test function.
The diffusion coefficient is specified with a material property; the "diffusion_coefficient" parameter is used to define the material property name which contains the diffusion coefficient. The Jacobian will account for partial derivatives of the diffusion coefficient with respect to the unknown variable if the "diffusion_coefficient_dT" property name is provided. These particular defaults for these parameters are the names used by HeatConductionMaterial, though you can also define these materials using other Material objects.
Example Input File Syntax
The case below demonstrates the use of HeatConduction where the diffusion coefficient (thermal conductivity) is defined by a HeatConductionMaterial.
[Kernels]
[heat_conduction]
type = HeatConduction
variable = T
[]
[]
[Materials]
[thermal]
type = HeatConductionMaterial
thermal_conductivity = 45.0
[]
[]
The case below instead demonstrates the use of HeatConduction where the diffusion coefficient (thermal conductivity) is defined by a ParsedMaterial
[Kernels]
[./heat]
type = HeatConduction
variable = u
[../]
[]
[Materials]
[./property]
type = GenericConstantMaterial
prop_names = 'density specific_heat'
prop_values = '1.0 1.0'
[../]
[./thermal_conductivity]
type = ParsedMaterial
property_name = 'thermal_conductivity'
coupled_variables = u
expression = '5 + 1e-3 * (u-0)'
[../]
[]
Input Parameters
- 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
- diffusion_coefficientthermal_conductivityProperty name of the diffusion coefficient
Default:thermal_conductivity
C++ Type:MaterialPropertyName
Unit:(no unit assumed)
Controllable:No
Description:Property name of the diffusion coefficient
- diffusion_coefficient_dTthermal_conductivity_dTProperty name of the derivative of the diffusion coefficient with respect to the variable
Default:thermal_conductivity_dT
C++ Type:MaterialPropertyName
Unit:(no unit assumed)
Controllable:No
Description:Property name of the derivative of the diffusion coefficient with respect to the variable
- displacementsThe displacements
C++ Type:std::vector<VariableName>
Unit:(no unit assumed)
Controllable:No
Description:The displacements
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>
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>
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>
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
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
Controllable:No
Description:The tag for the vectors this Kernel should fill
Contribution To Tagged Field Data 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.
- 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.)
- enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
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
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.)
- 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_meshTrueWhether 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:True
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.