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|---|---|---|---|
| 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-FileCopyrightInfo: 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 Specification of a function relating volume specific interfacial area to capillary pressure and saturation. | ||
| 11 | * This parametrization uses a maximum value of capillary pressure. | ||
| 12 | * | ||
| 13 | * \note It is used for calculating the interfacial area between the nonwetting and wetting phase | ||
| 14 | * by Nuske 2014 (https://elib.uni-stuttgart.de/handle/11682/614, page 60) \cite nuske2014. | ||
| 15 | */ | ||
| 16 | #ifndef DUMUX_MATERIAL_FLUIDMATRIX_TWO_P_INTERFACIAL_AREA_PC_MAX | ||
| 17 | #define DUMUX_MATERIAL_FLUIDMATRIX_TWO_P_INTERFACIAL_AREA_PC_MAX | ||
| 18 | |||
| 19 | #include <cmath> | ||
| 20 | #include <dune/common/exceptions.hh> | ||
| 21 | #include <dune/common/float_cmp.hh> | ||
| 22 | #include <dumux/common/parameters.hh> | ||
| 23 | |||
| 24 | namespace Dumux::FluidMatrix { | ||
| 25 | |||
| 26 | /*! | ||
| 27 | * \ingroup Fluidmatrixinteractions | ||
| 28 | * \brief Implementation of the polynomial of second order relating | ||
| 29 | * specific interfacial area to wetting phase saturation and capillary pressure. | ||
| 30 | */ | ||
| 31 | class InterfacialAreaPcMax | ||
| 32 | { | ||
| 33 | public: | ||
| 34 | |||
| 35 | template<class Scalar> | ||
| 36 | struct Params | ||
| 37 | { | ||
| 38 | 3 | Params(Scalar pcMax = 0, Scalar a1 = 0, Scalar a2 = 0, Scalar a3 = 0) | |
| 39 |
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3 | : pcMax_(pcMax), a1_(a1), a2_(a2), a3_(a3) {} |
| 40 | |||
| 41 | ✗ | Scalar pcMax() const { return pcMax_; } | |
| 42 |
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3 | void setPcMax(Scalar pcMax) { pcMax_ = pcMax; } |
| 43 | |||
| 44 | ✗ | Scalar a1() const { return a1_; } | |
| 45 |
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1 | void setA1(Scalar a1) { a1_ = a1; } |
| 46 | |||
| 47 | ✗ | Scalar a2() const { return a2_; } | |
| 48 |
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1 | void setA2(Scalar a2) { a2_ = a2; } |
| 49 | |||
| 50 | ✗ | Scalar a3() const { return a3_; } | |
| 51 |
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1 | void setA3(Scalar a3) { a3_ = a3; } |
| 52 | |||
| 53 | bool operator== (const Params& p) const | ||
| 54 | { | ||
| 55 | return Dune::FloatCmp::eq(pcMax(), p.pcMax(), 1e-6) | ||
| 56 | && Dune::FloatCmp::eq(a1(), p.a1(), 1e-6) | ||
| 57 | && Dune::FloatCmp::eq(a2(), p.a2(), 1e-6) | ||
| 58 | && Dune::FloatCmp::eq(a3(), p.a3(), 1e-6); | ||
| 59 | } | ||
| 60 | |||
| 61 | private: | ||
| 62 | Scalar pcMax_, a1_, a2_, a3_; | ||
| 63 | }; | ||
| 64 | |||
| 65 | /*! | ||
| 66 | * \brief Construct from a subgroup from the global parameter tree | ||
| 67 | * \note This will give you nice error messages if a mandatory parameter is missing | ||
| 68 | */ | ||
| 69 | template<class Scalar = double> | ||
| 70 | 2 | static Params<Scalar> makeParams(const std::string& paramGroup) | |
| 71 | { | ||
| 72 | 2 | const auto pcMax = getParamFromGroup<Scalar>(paramGroup, "PcMax"); | |
| 73 | 2 | const auto a1 = getParamFromGroup<Scalar>(paramGroup, "A1"); | |
| 74 | 2 | const auto a2 = getParamFromGroup<Scalar>(paramGroup, "A2"); | |
| 75 | 2 | const auto a3 = getParamFromGroup<Scalar>(paramGroup, "A3"); | |
| 76 | 4 | return {pcMax, a1, a2, a3}; | |
| 77 | } | ||
| 78 | |||
| 79 | /*! | ||
| 80 | * \brief The interfacial area | ||
| 81 | * | ||
| 82 | * the suggested (as estimated from pore network models) interfacial area between the nonwetting and wetting phase: | ||
| 83 | * \f$\mathrm{ | ||
| 84 | a_{wn} = a_{1} (p_{c { \sf max} } - p_{c}) (1-S_{w}) + a_{2} (p_{c {\sf max} } -p_{c})^2 (1-S_{w}) + a_{3} (p_{c {\sf max} }- p_{c}) (1-S_{w})^2 | ||
| 85 | }\f$ | ||
| 86 | * \param swe Effective saturation of the wetting phase | ||
| 87 | * \param pc Capillary pressure in \f$\mathrm{[Pa]}\f$ | ||
| 88 | * \param params parameter container for the coefficients of the surface | ||
| 89 | */ | ||
| 90 | template<class Scalar> | ||
| 91 | static Scalar area(const Scalar swe, const Scalar pc, const Params<Scalar>& params) | ||
| 92 | { | ||
| 93 | 1204168 | const Scalar a1 = params.a1(); | |
| 94 | 1204168 | const Scalar a2 = params.a2(); | |
| 95 | 1204168 | const Scalar a3 = params.a3(); | |
| 96 | 1204168 | const Scalar pcMax = params.pcMax(); | |
| 97 | 1204168 | return a1 * (pcMax-pc) * (1.0-swe) + a2*(pcMax-pc)*(pcMax-pc) * (1.-swe) + a3 * (pcMax-pc)*(1-swe)*(1-swe); | |
| 98 | } | ||
| 99 | }; | ||
| 100 | |||
| 101 | } // namespace Dumux::FluidMatrix | ||
| 102 | |||
| 103 | #endif | ||
| 104 |