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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 Assembly | ||
| 10 | * \brief An adapter class for local assemblers using numeric differentiation | ||
| 11 | */ | ||
| 12 | #ifndef DUMUX_ASSEMBLY_NUMERIC_EPSILON_HH | ||
| 13 | #define DUMUX_ASSEMBLY_NUMERIC_EPSILON_HH | ||
| 14 | |||
| 15 | #include <dune/common/fvector.hh> | ||
| 16 | #include <dumux/common/parameters.hh> | ||
| 17 | #include <dumux/common/numericdifferentiation.hh> | ||
| 18 | |||
| 19 | namespace Dumux { | ||
| 20 | |||
| 21 | /*! | ||
| 22 | * \ingroup Assembly | ||
| 23 | * \brief A helper class for local assemblers using numeric differentiation to determine the epsilon | ||
| 24 | * \tparam Scalar the scalar type | ||
| 25 | * \tparam numEq the number of primary variables / equations | ||
| 26 | */ | ||
| 27 | template<class Scalar, int numEq> | ||
| 28 | class NumericEpsilon | ||
| 29 | { | ||
| 30 | using NumEqVector = Dune::FieldVector<Scalar, numEq>; | ||
| 31 | |||
| 32 | public: | ||
| 33 | 1612 | explicit NumericEpsilon(const std::string& paramGroup = "") | |
| 34 | 1612 | { | |
| 35 | // get epsilons from input file with invalid default | ||
| 36 | 1612 | baseEps_ = getParamFromGroup<Scalar>(paramGroup, "Assembly.NumericDifference.BaseEpsilon", 1e-10); | |
| 37 | 3224 | magnitude_ = getParamFromGroup<NumEqVector>(paramGroup, "Assembly.NumericDifference.PriVarMagnitude", NumEqVector(-1)); | |
| 38 | 1612 | } | |
| 39 | |||
| 40 | /*! | ||
| 41 | * \brief get the epsilon | ||
| 42 | * \note If no user input was specified -> try to estimate magnitude from primary variable value | ||
| 43 | * else -> use given magnitude for the primary variable times the base epsilon (default 1e-10) | ||
| 44 | */ | ||
| 45 | 194179235 | Scalar operator() (Scalar priVar, int priVarIdx) const noexcept | |
| 46 | { | ||
| 47 |
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388358470 | return magnitude_[priVarIdx] > 0.0 ? baseEps_*magnitude_[priVarIdx] |
| 48 |
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187255167 | : NumericDifferentiation::epsilon(priVar, baseEps_); |
| 49 | } | ||
| 50 | |||
| 51 | private: | ||
| 52 | Scalar baseEps_; | ||
| 53 | NumEqVector magnitude_; | ||
| 54 | }; | ||
| 55 | |||
| 56 | } // end namespace Dumux | ||
| 57 | |||
| 58 | #endif | ||
| 59 |