- varVariable(s) to put the constraint on
C++ Type:std::vector<VariableName>
Controllable:No
Description:Variable(s) to put the constraint on
- 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
NodalEqualValueConstraint
Constrain two nodes to have identical values.
The constraint is imposed using a lagrange multiplier variable. The NodalEqualValueConstraint forms (part of) the equation for that variable, so its variable parameter is set to the lagrange multiplier scalar variable.
Constraining two nodes can be used to impose continuity conditions or to pin two independent systems on disjoint meshes together. The limitation to two nodes means that this kernel is not designed to work on sidesets or interfaces, except in 1D. To impose an equal value constraint on a sideset, please prefer the EqualValueConstraint.
Example input syntax
In this input file, a NodalEqualValueConstraint is used to impose an equality constraint between two disjoint line meshes.
[ScalarKernels]
[./ced]
type = NodalEqualValueConstraint
variable = lm
var = u
boundary = '100 101'
absolute_value_vector_tags = 'ref'
[../]
[]
Input Parameters
- boundaryThe list of boundary IDs from the mesh where this nodal kernel applies
C++ Type:std::vector<BoundaryName>
Controllable:No
Description:The list of boundary IDs from the mesh where this nodal kernel applies
- nodesSupply nodes using node ids
C++ Type:std::vector<unsigned long>
Controllable:No
Description:Supply nodes using node ids
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
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.
- 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
- 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_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
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.