permeabilitykozenycarman.hh

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
//
// SPDX-FileCopyrightText: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
// SPDX-License-Identifier: GPL-3.0-or-later
//
#ifndef DUMUX_PERMEABILITY_KOZENY_CARMAN_HH
#define DUMUX_PERMEABILITY_KOZENY_CARMAN_HH
 
#include <cmath>
#include <dune/common/fmatrix.hh>
#include <dune/common/math.hh>
 
namespace Dumux {
 
template<class PermeabilityType>
class PermeabilityKozenyCarman
{
public:
    template<class Scalar>
    PermeabilityType evaluatePermeability(PermeabilityType refPerm, Scalar refPoro, Scalar poro) const
    {
        using Dune::power;
        auto factor = power((1.0 - refPoro)/(1.0 - poro), 2) * power(poro/refPoro, 3);
        refPerm *= factor;
        return refPerm;
    }
};
 
} // namespace Dumux
 
#endif