MFEMComplexExteriorProductAux.C

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
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//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html

#ifdef MOOSE_MFEM_ENABLED

#include "MFEMComplexExteriorProductAux.h"
#include "MFEMProblem.h"

registerMooseObject("MooseApp", MFEMComplexExteriorProductAux);

InputParameters
MFEMComplexExteriorProductAux::validParams()
{
  InputParameters params = MFEMComplexAuxKernel::validParams();
  params.addClassDescription(
      "Projects $s \\vec u \\wedge \\vec v*$ onto a complex vector MFEM auxvariable");
  MFEMExecutedObject::addRequiredDependencyParam<VariableName>(
      params, "first_source_vec", "Complex vector variable (3D)");
  MFEMExecutedObject::addRequiredDependencyParam<VariableName>(
      params, "second_source_vec", "Complex vector variable (3D)");
  params.addParam<mfem::real_t>("scale_factor_real", 1.0, "Real part of constant multiplier");
  params.addParam<mfem::real_t>("scale_factor_imag", 0.0, "Imaginary part of constant multiplier");

  return params;
}

MFEMComplexExteriorProductAux::MFEMComplexExteriorProductAux(const InputParameters & parameters)
  : MFEMComplexAuxKernel(parameters),
    _scale_factor(getParam<mfem::real_t>("scale_factor_real"),
                  getParam<mfem::real_t>("scale_factor_imag")),
    _u_coef_real(getVectorCoefficientByName(getParam<VariableName>("first_source_vec") + "_real")),
    _u_coef_imag(getVectorCoefficientByName(getParam<VariableName>("first_source_vec") + "_imag")),
    _v_coef_real(getVectorCoefficientByName(getParam<VariableName>("second_source_vec") + "_real")),
    _v_coef_imag(getVectorCoefficientByName(getParam<VariableName>("second_source_vec") + "_imag")),
    _cross_ur_vr(_u_coef_real, _v_coef_real),
    _cross_ur_vi(_u_coef_real, _v_coef_imag),
    _cross_ui_vr(_u_coef_imag, _v_coef_real),
    _cross_ui_vi(_u_coef_imag, _v_coef_imag),
    _final_coef_real(_cross_ur_vr, _cross_ui_vi, 1.0, 1.0), // Accounting for hermitian conjugation
    _final_coef_imag(_cross_ur_vi, _cross_ui_vr, -1.0, 1.0)
{
  // The target variable's finite element space
  mfem::ParFiniteElementSpace * fes = _result_var.ParFESpace();

  // Must be [L2]^3
  if (!dynamic_cast<const mfem::L2_FECollection *>(fes->FEColl()) || fes->GetVDim() != 3)
    mooseError("MFEMComplexExteriorProductAux requires the target variable to be vector [L2]^3.");

  // Must have no shared/constrained DOFs (pure interior DOFs)
  if (fes->GetTrueVSize() != fes->GetVSize())
    mooseError("MFEMComplexExteriorProductAux currently supports only L2 spaces with interior DOFs "
               "(no shared/constrained DOFs).");
}

void
MFEMComplexExteriorProductAux::execute()
{
  _result_var.ProjectCoefficient(_final_coef_real, _final_coef_imag);

  complexScale(_result_var, _scale_factor);
}

#endif // MOOSE_MFEM_ENABLED