RichardsRelPermPrimePrimeAux.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

//  This post processor returns d^2(relperm)/d(Seff)^2
//
#include "RichardsRelPermPrimePrimeAux.h"

registerMooseObject("RichardsApp", RichardsRelPermPrimePrimeAux);

InputParameters
RichardsRelPermPrimePrimeAux::validParams()
{
  InputParameters params = AuxKernel::validParams();
  params.addRequiredCoupledVar("seff_var", "The variable that represents the effective saturation");
  params.addRequiredParam<UserObjectName>(
      "relperm_UO", "Name of user object that defines the relative permeability.");
  params.addClassDescription("auxillary variable which is d^2(relative permeability)/dSeff^2");
  return params;
}

RichardsRelPermPrimePrimeAux::RichardsRelPermPrimePrimeAux(const InputParameters & parameters)
  : AuxKernel(parameters),
    _seff_var(coupledValue("seff_var")),
    _relperm_UO(getUserObject<RichardsRelPerm>("relperm_UO"))
{
}

Real
RichardsRelPermPrimePrimeAux::computeValue()
{
  return _relperm_UO.d2relperm(_seff_var[_qp]);
}