CHMath.C

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//* Licensed under LGPL 2.1, please see LICENSE for details
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#include "CHMath.h"
 
registerMooseObject("PhaseFieldApp", CHMath);
 
template <>
InputParameters
validParams<CHMath>()
{
  InputParameters params = CHBulk<Real>::validParams();
  params.addClassDescription(
      "Simple demonstration Cahn-Hilliard Kernel using an algebraic double-well potential");
  return params;
}
 
CHMath::CHMath(const InputParameters & parameters) : CHBulk<Real>(parameters) {}
 
RealGradient // Use This an example of the the function should look like
    CHMath::computeGradDFDCons(PFFunctionType type)
{
  switch (type)
  {
    case Residual:
      return 3 * _u[_qp] * _u[_qp] * _grad_u[_qp] - _grad_u[_qp]; // return Residual value
 
    case Jacobian:
      return 6 * _u[_qp] * _phi[_j][_qp] * _grad_u[_qp] +
             3 * _u[_qp] * _u[_qp] * _grad_phi[_j][_qp] -
             _grad_phi[_j][_qp]; // return Jacobian value
  }
 
  mooseError("Invalid type passed in");
}