ADPhaseFieldCoupledDoubleWellPotential.C

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//* This file is part of the MOOSE framework
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//* 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 "ADPhaseFieldCoupledDoubleWellPotential.h"
 
registerMooseObject("PhaseFieldApp", ADPhaseFieldCoupledDoubleWellPotential);
 
InputParameters
ADPhaseFieldCoupledDoubleWellPotential::validParams()
{
  InputParameters params = ADKernelValue::validParams();
  params.addClassDescription("Double well potential for Cahn-Hilliard advection.");
  params.addRequiredCoupledVar("c", "phase field variable");
  params.addRequiredParam<Real>("prefactor", "prefactor for double well potential");
  return params;
}
 
ADPhaseFieldCoupledDoubleWellPotential::ADPhaseFieldCoupledDoubleWellPotential(
    const InputParameters & parameters)
  : ADKernelValue(parameters), _c(adCoupledValue("c")), _prefactor(getParam<Real>("prefactor"))
 
{
}
 
ADReal
ADPhaseFieldCoupledDoubleWellPotential::precomputeQpResidual()
{
  return _prefactor * _c[_qp] * (_c[_qp] * _c[_qp] - 1);
}