MFEMVectorDirichletBC

Overview

Boundary condition for enforcing an essential (Dirichlet) boundary condition on all components of a vector conforming variable on the boundary. The boundary value is a coefficient that may vary in space and/or time.

Example Input File Syntax

[BCs<<<{"href": "../../../syntax/BCs/index.html"}>>>]
  [dirichlet]
    type = MFEMVectorDirichletBC<<<{"description": "Applies a Dirichlet condition to all components of a vector variable.", "href": "MFEMVectorDirichletBC.html"}>>>
    variable<<<{"description": "Variable on which to apply the boundary condition"}>>> = displacement
    boundary<<<{"description": "The list of boundaries (ids or names) from the mesh where this object applies. Defaults to all boundaries."}>>> = '1'
  []
  [pull_down]
    type = MFEMVectorBoundaryIntegratedBC<<<{"description": "Adds the boundary integrator to an MFEM problem for the linear form $(\\vec f, \\vec v)_{\\partial\\Omega}$", "href": "MFEMVectorBoundaryIntegratedBC.html"}>>>
    variable<<<{"description": "Variable on which to apply the boundary condition"}>>> = displacement
    boundary<<<{"description": "The list of boundaries (ids or names) from the mesh where this object applies. Defaults to all boundaries."}>>> = '2'
    vector_coefficient<<<{"description": "Vector coefficient used in the boundary integrator. A functor is any of the following: a variable, an MFEM material property, a function, a postprocessor or a numeric vector value (enclosed in curly braces)."}>>> = '0.0 0.0 -0.01'
  []
[]
(test/tests/mfem/kernels/linearelasticity.i)

Input Parameters

  • boundary-1 The list of boundaries (ids or names) from the mesh where this object applies. Defaults to all boundaries.

    Default:-1

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

    Controllable:No

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

  • variableVariable on which to apply the boundary condition

    C++ Type:VariableName

    Unit:(no unit assumed)

    Controllable:No

    Description:Variable on which to apply the boundary condition

  • vector_coefficient0. 0. 0.Vector coefficient specifying the values the variable takes on the boundary. A functor is any of the following: a variable, an MFEM material property, a function, a postprocessor or a numeric vector value (enclosed in curly braces).

    Default:0. 0. 0.

    C++ Type:MFEMVectorCoefficientName

    Controllable:No

    Description:Vector coefficient specifying the values the variable takes on the boundary. A functor is any of the following: a variable, an MFEM material property, a function, a postprocessor or a numeric vector value (enclosed in curly braces).

Optional 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.

  • enableTrueSet the enabled status of the MooseObject.

    Default:True

    C++ Type:bool

    Controllable:No

    Description:Set the enabled status of the MooseObject.

Advanced Parameters

Input Files