ADPhaseFieldAdvectionSUPG.C

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//* This file is part of the MOOSE framework
//* https://www.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 "ADPhaseFieldAdvectionSUPG.h"
 
registerMooseObject("PhaseFieldApp", ADPhaseFieldAdvectionSUPG);
 
InputParameters
ADPhaseFieldAdvectionSUPG::validParams()
{
  InputParameters params = ADKernelGrad::validParams();
  params.addClassDescription(
      "SUPG stablization term for the advection portion of the level set equation.");
  params.addRequiredCoupledVar("velocity", "Velocity vector variable.");
  return params;
}
 
ADPhaseFieldAdvectionSUPG::ADPhaseFieldAdvectionSUPG(const InputParameters & parameters)
  : ADKernelGrad(parameters), _velocity(adCoupledVectorValue("velocity"))
{
}
 
ADRealVectorValue
ADPhaseFieldAdvectionSUPG::precomputeQpResidual()
{
  ADReal tau =
      _current_elem->hmin() /
      (2 * (_velocity[_qp] + RealVectorValue(libMesh::TOLERANCE * libMesh::TOLERANCE)).norm());
  return (tau * _velocity[_qp]) * (_velocity[_qp] * _grad_u[_qp]);
}