MFEMMixedVectorGradientKernel.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 MFEM_ENABLED

#include "MFEMMixedVectorGradientKernel.h"
#include "MFEMProblem.h"

registerMooseObject("MooseApp", MFEMMixedVectorGradientKernel);

InputParameters
MFEMMixedVectorGradientKernel::validParams()
{
  InputParameters params = MFEMMixedBilinearFormKernel::validParams();
  params.addClassDescription(
      "Adds the domain integrator to an MFEM problem for the mixed bilinear form "
      "$(k\\vec\\nabla u, \\vec v)_\\Omega$ "
      "arising from the weak form of the gradient operator "
      "$k\\vec \\nabla u$.");
  params.addParam<MFEMScalarCoefficientName>("coefficient", "1.", "Name of property k to use.");
  return params;
}

MFEMMixedVectorGradientKernel::MFEMMixedVectorGradientKernel(const InputParameters & parameters)
  : MFEMMixedBilinearFormKernel(parameters),
    // FIXME: The MFEM bilinear form can also handle vector and matrix
    // coefficients, so ideally we'd handle all three too.
    _coef(getScalarCoefficient(getParam<MFEMScalarCoefficientName>("coefficient")))
{
}

mfem::BilinearFormIntegrator *
MFEMMixedVectorGradientKernel::createBFIntegrator()
{
  return new mfem::MixedVectorGradientIntegrator(_coef);
}

#endif