ADCHSplitConcentration.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 "ADCHSplitConcentration.h"
 
registerMooseObject("PhaseFieldApp", ADCHSplitConcentration);
 
InputParameters
ADCHSplitConcentration::validParams()
{
  InputParameters params = ADKernel::validParams();
  params.addClassDescription("Concentration kernel in Split Cahn-Hilliard that solves chemical "
                             "potential in a weak form");
  params.addRequiredCoupledVar("chemical_potential_var", "Chemical potential variable");
  params.addRequiredParam<MaterialPropertyName>("mobility", "Mobility property name");
  return params;
}
 
ADCHSplitConcentration::ADCHSplitConcentration(const InputParameters & parameters)
  : ADKernel(parameters),
    _grad_mu(adCoupledGradient("chemical_potential_var")),
    _mobility(getADMaterialProperty<Real>("mobility"))
{
}
 
ADReal
ADCHSplitConcentration::computeQpResidual()
{
  return _mobility[_qp] * _grad_mu[_qp] * _grad_test[_i][_qp];
}