PiecewiseConstantVariable

When this type of variable is used instead of a typical finite volume variable, faces for which the neighboring elements have different cell-center values will be treated as extrapolated boundary faces. E.g. when this variable is queried for a face value on the "element" side of the face, the element cell center value will be returned; when this variable is queried for a face value on the "neighbor" side of the face, the neighbor cell center value will be returned. This variable type can be used to ensure that interpolation is not performed between potentially sharply discontinuous values.

Input Parameters

  • arrayFalseTrue to make this variable a array variable regardless of number of components. If 'components' > 1, this will automatically be set to true.

    Default:False

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:No

    Description:True to make this variable a array variable regardless of number of components. If 'components' > 1, this will automatically be set to true.

  • blockThe list of blocks (ids or names) that this object will be applied

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

    Unit:(no unit assumed)

    Controllable:No

    Description:The list of blocks (ids or names) that this object will be applied

  • cache_cell_gradientsTrueWhether to cache cell gradients or re-compute them.

    Default:True

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:No

    Description:Whether to cache cell gradients or re-compute them.

  • components1Number of components for an array variable

    Default:1

    C++ Type:unsigned int

    Unit:(no unit assumed)

    Controllable:No

    Description:Number of components for an array variable

  • face_interp_methodaverageSwitch that can select between face interpolation methods.

    Default:average

    C++ Type:MooseEnum

    Unit:(no unit assumed)

    Options:average, skewness-corrected

    Controllable:No

    Description:Switch that can select between face interpolation methods.

  • familyMONOMIALSpecifies the family of FE shape functions to use for this variable.

    Default:MONOMIAL

    C++ Type:MooseEnum

    Unit:(no unit assumed)

    Options:LAGRANGE, MONOMIAL, HERMITE, SCALAR, HIERARCHIC, CLOUGH, XYZ, SZABAB, BERNSTEIN, L2_LAGRANGE, L2_HIERARCHIC, NEDELEC_ONE, LAGRANGE_VEC, MONOMIAL_VEC, RAVIART_THOMAS, RATIONAL_BERNSTEIN, SIDE_HIERARCHIC, L2_HIERARCHIC_VEC, L2_LAGRANGE_VEC, L2_RAVIART_THOMAS

    Controllable:No

    Description:Specifies the family of FE shape functions to use for this variable.

  • fvTrueTrue to make this variable a finite volume variable

    Default:True

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:No

    Description:True to make this variable a finite volume variable

  • orderCONSTANTOrder of the FE shape function to use for this variable (additional orders not listed here are allowed, depending on the family).

    Default:CONSTANT

    C++ Type:MooseEnum

    Unit:(no unit assumed)

    Options:CONSTANT, FIRST, SECOND, THIRD, FOURTH, FIFTH, SIXTH, SEVENTH, EIGHTH, NINTH, TENTH, ELEVENTH, TWELFTH, THIRTEENTH, FOURTEENTH, FIFTEENTH, SIXTEENTH, SEVENTEENTH, EIGHTTEENTH, NINETEENTH, TWENTIETH, TWENTYFIRST, TWENTYSECOND, TWENTYTHIRD, TWENTYFOURTH, TWENTYFIFTH, TWENTYSIXTH, TWENTYSEVENTH, TWENTYEIGHTH, TWENTYNINTH, THIRTIETH, THIRTYFIRST, THIRTYSECOND, THIRTYTHIRD, THIRTYFOURTH, THIRTYFIFTH, THIRTYSIXTH, THIRTYSEVENTH, THIRTYEIGHTH, THIRTYNINTH, FORTIETH, FORTYFIRST, FORTYSECOND, FORTYTHIRD

    Controllable:No

    Description:Order of the FE shape function to use for this variable (additional orders not listed here are allowed, depending on the family).

  • solver_sysnl0If this variable is a solver variable, this is the solver system to which it should be added.

    Default:nl0

    C++ Type:SolverSystemName

    Unit:(no unit assumed)

    Controllable:No

    Description:If this variable is a solver variable, this is the solver system to which it should be added.

  • two_term_boundary_expansionTrueWhether to use a two-term Taylor expansion to calculate boundary face values. If the two-term expansion is used, then the boundary face value depends on the adjoining cell center gradient, which itself depends on the boundary face value. Consequently an implicit solve is used to simultaneously solve for the adjoining cell center gradient and boundary face value(s).

    Default:True

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:No

    Description:Whether to use a two-term Taylor expansion to calculate boundary face values. If the two-term expansion is used, then the boundary face value depends on the adjoining cell center gradient, which itself depends on the boundary face value. Consequently an implicit solve is used to simultaneously solve for the adjoining cell center gradient and boundary face value(s).

  • use_dualFalseTrue to use dual basis for Lagrange multipliers

    Default:False

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:No

    Description:True to use dual basis for Lagrange multipliers

Optional 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.

  • eigenFalseTrue to make this variable an eigen variable

    Default:False

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:No

    Description:True to make this variable an eigen variable

  • enableTrueSet the enabled status of the MooseObject.

    Default:True

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:No

    Description:Set the enabled status of the MooseObject.

  • outputsVector of output names where you would like to restrict the output of variables(s) associated with this object

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

    Unit:(no unit assumed)

    Controllable:No

    Description:Vector of output names where you would like to restrict the output of variables(s) associated with this object

  • scalingSpecifies a scaling factor to apply to this variable

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

    Unit:(no unit assumed)

    Controllable:No

    Description:Specifies a scaling factor to apply to this variable

Advanced Parameters