PorousFlowFLACrelperm.h

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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

#pragma once

#include "MooseTypes.h"

namespace PorousFlowFLACrelperm
{
template <typename T>
T
relativePermeability(const T & seff, Real m)
{
  if (MetaPhysicL::raw_value(seff) <= 0.0)
    return 0.0;
  else if (MetaPhysicL::raw_value(seff) >= 1.0)
    return 1.0;

  using std::pow;
  return (1.0 + m) * pow(seff, m) - m * pow(seff, m + 1.0);
}

Real dRelativePermeability(Real seff, Real m);

Real d2RelativePermeability(Real seff, Real m);
}