PorousFlowEnergyTimeDerivative

Derivative of heat-energy-density wrt time

This Kernel implements the weak form of where all parameters are defined in the nomenclature.

commentnote

An energy-lumped version is implemented.

See mass lumping for details.

For mechanically-coupled simulations (where the mesh deforms) the numerical implementation of this Kernel involves the old value of the volumetric strain. Further information can be found here. This is assumed to be calculated by a SolidMechanics strain calculator, for instance ComputeSmallStrain, with a given base_name. Hence, you should usually employ the same base_name for this Kernel as used by your strain calculator. However, if you wish to include mechanical deformations, but not couple them to the porous flow, simply enter a base_name that doesn't exist (eg base_name = non_existent) and the volumetric strain won't be included in this Kernel. (Note: if you want a fully-coupled simulation but accidentally make a typo in your base_name, then PorousFlow will assume you don't want to include the volumetric strain!)

Because it contains volumetric strain, this Kernel always sets use_displaced_mesh = false and the parameter cannot be altered by the user. Further information can be found here

Input Parameters

  • PorousFlowDictatorThe UserObject that holds the list of PorousFlow variable names.

    C++ Type:UserObjectName

    Controllable:No

    Description:The UserObject that holds the list of PorousFlow variable names.

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

    C++ Type:NonlinearVariableName

    Controllable:No

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

Required Parameters

  • base_nameFor mechanically-coupled systems, this Kernel will depend on the volumetric strain. base_name should almost always be the same base_name as given to the TensorMechanics object that computes strain. Supplying a base_name to this Kernel but not defining an associated TensorMechanics strain calculator means that this Kernel will not depend on volumetric strain. That could be useful when models contain solid mechanics that is not coupled to porous flow, for example

    C++ Type:std::string

    Controllable:No

    Description:For mechanically-coupled systems, this Kernel will depend on the volumetric strain. base_name should almost always be the same base_name as given to the TensorMechanics object that computes strain. Supplying a base_name to this Kernel but not defining an associated TensorMechanics strain calculator means that this Kernel will not depend on volumetric strain. That could be useful when models contain solid mechanics that is not coupled to porous flow, for example

  • 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

  • displacementsThe displacements

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

    Controllable:No

    Description:The displacements

  • 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.

  • strain_at_nearest_qpFalseWhen calculating nodal porosity that depends on strain, use the strain at the nearest quadpoint. This adds a small extra computational burden, and is not necessary for simulations involving only linear lagrange elements. If you set this to true, you will also want to set the same parameter to true for related Kernels and Materials

    Default:False

    C++ Type:bool

    Controllable:No

    Description:When calculating nodal porosity that depends on strain, use the strain at the nearest quadpoint. This adds a small extra computational burden, and is not necessary for simulations involving only linear lagrange elements. If you set this to true, you will also want to set the same parameter to true for related Kernels and Materials

  • 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.

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_tagssystem timeThe tag for the matrices this Kernel should fill

    Default:system time

    C++ Type:MultiMooseEnum

    Options:nontime, system, time

    Controllable:No

    Description:The tag for the matrices this Kernel should fill

  • vector_tagstimeThe tag for the vectors this Kernel should fill

    Default:time

    C++ Type:MultiMooseEnum

    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>

    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>

    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>

    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

Advanced Parameters

Input Files