MFEMDivDivKernel.C

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* 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 "MFEMDivDivKernel.h"
#include "MFEMProblem.h"
 
registerMooseObject("MooseApp", MFEMDivDivKernel);
 
InputParameters
MFEMDivDivKernel::validParams()
{
  InputParameters params = MFEMKernel::validParams();
  params.addClassDescription(
      "Adds the domain integrator to an MFEM problem for the bilinear form "
      "$(k\\vec\\nabla \\cdot \\vec u, \\vec\\nabla \\cdot \\vec v)_\\Omega$ "
      "arising from the weak form of the grad-div operator "
      "$-\\vec\\nabla \\left( k \\vec\\nabla \\cdot \\vec u \\right)$.");
 
  params.addParam<MFEMScalarCoefficientName>(
      "coefficient", "1.", "Name of property k to multiply the integrator by");
 
  return params;
}
 
MFEMDivDivKernel::MFEMDivDivKernel(const InputParameters & parameters)
  : MFEMKernel(parameters), _coef(getScalarCoefficient("coefficient"))
{
}
 
mfem::BilinearFormIntegrator *
MFEMDivDivKernel::createBFIntegrator()
{
  return new mfem::DivDivIntegrator(_coef);
}
 
#endif