| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- | ||
| 2 | // vi: set et ts=4 sw=4 sts=4: | ||
| 3 | // | ||
| 4 | // SPDX-FileCopyrightText: Copyright © DuMux Project contributors, see AUTHORS.md in root folder | ||
| 5 | // SPDX-License-Identifier: GPL-3.0-or-later | ||
| 6 | // | ||
| 7 | /*! | ||
| 8 | * \file | ||
| 9 | * \ingroup Fluidmatrixinteractions | ||
| 10 | * \brief The Kozeny-Carman relationship for the calculation of a porosity-dependent permeability. | ||
| 11 | */ | ||
| 12 | |||
| 13 | #ifndef DUMUX_PERMEABILITY_KOZENY_CARMAN_HH | ||
| 14 | #define DUMUX_PERMEABILITY_KOZENY_CARMAN_HH | ||
| 15 | |||
| 16 | #include <cmath> | ||
| 17 | #include <dune/common/fmatrix.hh> | ||
| 18 | #include <dune/common/math.hh> | ||
| 19 | |||
| 20 | namespace Dumux { | ||
| 21 | |||
| 22 | /*! | ||
| 23 | * \ingroup Fluidmatrixinteractions | ||
| 24 | * \brief The Kozeny-Carman relationship for the calculation of a porosity-dependent permeability. | ||
| 25 | * When the porosity is implemented as solution-independent, using this relationship for the | ||
| 26 | * permeability leads to unnecessary overhead. | ||
| 27 | * | ||
| 28 | * \tparam PermeabilityType The type used for the intrinsic permeability | ||
| 29 | */ | ||
| 30 | template<class PermeabilityType> | ||
| 31 | class PermeabilityKozenyCarman | ||
| 32 | { | ||
| 33 | public: | ||
| 34 | /*! | ||
| 35 | * \brief Calculates the permeability for a given sub-control volume | ||
| 36 | * \param refPerm Reference permeability before porosity changes | ||
| 37 | * \param refPoro The poro corresponding to the reference permeability | ||
| 38 | * \param poro The porosity for which permeability is to be evaluated | ||
| 39 | */ | ||
| 40 | template<class Scalar> | ||
| 41 | 7766187 | PermeabilityType evaluatePermeability(PermeabilityType refPerm, Scalar refPoro, Scalar poro) const | |
| 42 | { | ||
| 43 | using Dune::power; | ||
| 44 | 15532374 | auto factor = power((1.0 - refPoro)/(1.0 - poro), 2) * power(poro/refPoro, 3); | |
| 45 | 7766187 | refPerm *= factor; | |
| 46 | return refPerm; | ||
| 47 | } | ||
| 48 | }; | ||
| 49 | |||
| 50 | } // namespace Dumux | ||
| 51 | |||
| 52 | #endif | ||
| 53 |