ScalarBulkEnergyA

Overview

Sets up the RHS of the coupled Landau-Khalatnikov equation. Since we are working with ScalarKernels, this is effectively a single grid point, or homogeneous calculation. In the context of micromagnetics, this is the macrospin analog for ferroelectrics. This object concerns the bulk contribution from the antiphase oxygen octahedral tilts (in the case of ),

Ignoring the LHS and working in index notation,

In Voight notation, many of these terms vanish due to symmetry of the parent phase.

Example Input File Syntax

Input Parameters

  • componentAn integer corresponding to the direction the variable this kernel acts in. (0 for x, 1 for y, 2.0 for z)

    C++ Type:unsigned int

    Controllable:No

    Description:An integer corresponding to the direction the variable this kernel acts in. (0 for x, 1 for y, 2.0 for z)

  • 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

  • Ar1the first coefficient

    Default:1

    C++ Type:double

    Controllable:No

    Description:the first coefficient

  • Br1the second coefficient

    Default:1

    C++ Type:double

    Controllable:No

    Description:the second coefficient

  • Cr1the third coefficient

    Default:1

    C++ Type:double

    Controllable:No

    Description:the third coefficient

  • G1the time constant

    Default:1

    C++ Type:double

    Controllable:No

    Description:the time constant

  • antiferrodis_A_xvariable antiferrodis_A_x coupled into this kernel

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

    Controllable:No

    Description:variable antiferrodis_A_x coupled into this kernel

  • antiferrodis_A_yvariable antiferrodis_A_y coupled into this kernel

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

    Controllable:No

    Description:variable antiferrodis_A_y coupled into this kernel

  • antiferrodis_A_zvariable antiferrodis_A_z coupled into this kernel

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

    Controllable:No

    Description:variable antiferrodis_A_z coupled into this kernel

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

    Options:nontime, system

    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

    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.

  • 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.

Advanced Parameters

Input Files