SplitCHParsed.C

Go to the documentation of this file.

//* This file is part of the MOOSE framework
//* https://www.mooseframework.org
//*
//* 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
 
#include "SplitCHParsed.h"
 
registerMooseObject("PhaseFieldApp", SplitCHParsed);
 
template <>
InputParameters
validParams<SplitCHParsed>()
{
  InputParameters params = validParams<SplitCHCRes>();
  params.addClassDescription(
      "Split formulation Cahn-Hilliard Kernel that uses a DerivativeMaterial Free Energy");
  params.addRequiredParam<MaterialPropertyName>(
      "f_name", "Base name of the free energy function F defined in a DerivativeParsedMaterial");
  params.addCoupledVar("args", "Vector of additional arguments to F");
  return params;
}
 
SplitCHParsed::SplitCHParsed(const InputParameters & parameters)
  : DerivativeMaterialInterface<JvarMapKernelInterface<SplitCHCRes>>(parameters),
    _nvar(_coupled_moose_vars.size()),
    _dFdc(getMaterialPropertyDerivative<Real>("f_name", _var.name())),
    _d2Fdc2(getMaterialPropertyDerivative<Real>("f_name", _var.name(), _var.name()))
{
  // reserve space for derivatives
  _d2Fdcdarg.resize(_nvar);
 
  // Iterate over all coupled variables
  for (unsigned int i = 0; i < _nvar; ++i)
    _d2Fdcdarg[i] =
        &getMaterialPropertyDerivative<Real>("f_name", _var.name(), _coupled_moose_vars[i]->name());
}
 
void
SplitCHParsed::initialSetup()
{
  validateNonlinearCoupling<Real>("f_name", _var.name());
  validateDerivativeMaterialPropertyBase<Real>("f_name");
}
 
Real
SplitCHParsed::computeDFDC(PFFunctionType type)
{
  switch (type)
  {
    case Residual:
      return _dFdc[_qp];
 
    case Jacobian:
      return _d2Fdc2[_qp] * _phi[_j][_qp];
  }
 
  mooseError("Internal error");
}
 
Real
SplitCHParsed::computeQpOffDiagJacobian(unsigned int jvar)
{
  if (jvar == _w_var)
    return SplitCHCRes::computeQpOffDiagJacobian(jvar);
 
  // get the coupled variable jvar is referring to
  const unsigned int cvar = mapJvarToCvar(jvar);
 
  return (*_d2Fdcdarg[cvar])[_qp] * _phi[_j][_qp] * _test[_i][_qp];
}