SplitCHMath.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
 
#include "SplitCHMath.h"
 
registerMooseObject("PhaseFieldApp", SplitCHMath);
 
InputParameters
SplitCHMath::validParams()
{
  InputParameters params = SplitCHCRes::validParams();
  params.addClassDescription("Simple demonstration split formulation Cahn-Hilliard Kernel using an "
                             "algebraic double-well potential");
  return params;
}
 
SplitCHMath::SplitCHMath(const InputParameters & parameters) : SplitCHCRes(parameters) {}
 
Real
SplitCHMath::computeDFDC(PFFunctionType type)
{
  switch (type)
  {
    case Residual:
      return _u[_qp] * _u[_qp] * _u[_qp] - _u[_qp]; // return Residual value
 
    case Jacobian:
      return (3.0 * _u[_qp] * _u[_qp] - 1.0) * _phi[_j][_qp]; // return Jacobian value
  }
 
  mooseError("Invalid type passed in");
}