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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 NavierStokesNCTests | ||
| 10 | * \brief Density driven flow test for the multi-component staggered grid (Navier-)Stokes model. | ||
| 11 | */ | ||
| 12 | |||
| 13 | #ifndef DUMUX_DENSITY_DRIVEN_NC_TEST_PROBLEM_HH | ||
| 14 | #define DUMUX_DENSITY_DRIVEN_NC_TEST_PROBLEM_HH | ||
| 15 | |||
| 16 | #include <dumux/common/parameters.hh> | ||
| 17 | #include <dumux/common/properties.hh> | ||
| 18 | #include <dumux/common/timeloop.hh> | ||
| 19 | |||
| 20 | #include <dumux/freeflow/navierstokes/boundarytypes.hh> | ||
| 21 | |||
| 22 | #include <dumux/freeflow/navierstokes/momentum/fluxhelper.hh> | ||
| 23 | #include <dumux/freeflow/navierstokes/scalarfluxhelper.hh> | ||
| 24 | |||
| 25 | namespace Dumux { | ||
| 26 | |||
| 27 | /*! | ||
| 28 | * \ingroup NavierStokesNCTests | ||
| 29 | * \brief Test problem for the one-phase (Navier-)Stokes model. | ||
| 30 | * | ||
| 31 | * Density driven flow test for the multi-component staggered grid (Navier-)Stokes model. | ||
| 32 | */ | ||
| 33 | template <class TypeTag, class BaseProblem> | ||
| 34 | class DensityDrivenFlowProblem : public BaseProblem | ||
| 35 | { | ||
| 36 | using ParentType = BaseProblem; | ||
| 37 | using BoundaryTypes = typename ParentType::BoundaryTypes; | ||
| 38 | using FluidSystem = GetPropType<TypeTag, Properties::FluidSystem>; | ||
| 39 | using GridGeometry = GetPropType<TypeTag, Properties::GridGeometry>; | ||
| 40 | using FVElementGeometry = typename GridGeometry::LocalView; | ||
| 41 | using SubControlVolume = typename FVElementGeometry::SubControlVolume; | ||
| 42 | using SubControlVolumeFace = typename FVElementGeometry::SubControlVolumeFace; | ||
| 43 | using Indices = typename GetPropType<TypeTag, Properties::ModelTraits>::Indices; | ||
| 44 | using ModelTraits = GetPropType<TypeTag, Properties::ModelTraits>; | ||
| 45 | using InitialValues = typename ParentType::InitialValues; | ||
| 46 | using Sources = typename ParentType::Sources; | ||
| 47 | using DirichletValues = typename ParentType::DirichletValues; | ||
| 48 | using BoundaryFluxes = typename ParentType::BoundaryFluxes; | ||
| 49 | using Scalar = GetPropType<TypeTag, Properties::Scalar>; | ||
| 50 | using SolutionVector = GetPropType<TypeTag, Properties::SolutionVector>; | ||
| 51 | |||
| 52 | static constexpr auto dimWorld = GridGeometry::GridView::dimensionworld; | ||
| 53 | using Element = typename GridGeometry::GridView::template Codim<0>::Entity; | ||
| 54 | using GlobalPosition = typename Element::Geometry::GlobalCoordinate; | ||
| 55 | using VelocityVector = Dune::FieldVector<Scalar, dimWorld>; | ||
| 56 | |||
| 57 | using CouplingManager = GetPropType<TypeTag, Properties::CouplingManager>; | ||
| 58 | |||
| 59 | using TimeLoopPtr = std::shared_ptr<CheckPointTimeLoop<Scalar>>; | ||
| 60 | |||
| 61 | static constexpr auto compIdx = 1; | ||
| 62 | |||
| 63 | public: | ||
| 64 | 4 | DensityDrivenFlowProblem(std::shared_ptr<const GridGeometry> gridGeometry, | |
| 65 | std::shared_ptr<CouplingManager> couplingManager) | ||
| 66 | : ParentType(gridGeometry, couplingManager) | ||
| 67 |
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16 | , eps_(1e-6) |
| 68 | { | ||
| 69 |
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4 | useWholeLength_ = getParam<bool>("Problem.UseWholeLength"); |
| 70 | 4 | } | |
| 71 | |||
| 72 | /*! | ||
| 73 | * \brief Returns a reference pressure at a given sub control volume face. | ||
| 74 | * This pressure is subtracted from the actual pressure for the momentum balance | ||
| 75 | * which potentially helps to improve numerical accuracy by avoiding issues related to floating point arithmetic. | ||
| 76 | */ | ||
| 77 | ✗ | Scalar referencePressure(const Element& element, | |
| 78 | const FVElementGeometry& fvGeometry, | ||
| 79 | const SubControlVolumeFace& scvf) const | ||
| 80 | ✗ | { return 1.1e5; } | |
| 81 | |||
| 82 | /*! | ||
| 83 | * \brief Specifies which kind of boundary condition should be | ||
| 84 | * used for which equation on a given boundary control volume. | ||
| 85 | * | ||
| 86 | * \param globalPos The position of the center of the finite volume | ||
| 87 | */ | ||
| 88 | 267200 | BoundaryTypes boundaryTypesAtPos(const GlobalPosition& globalPos) const | |
| 89 | { | ||
| 90 | 267200 | BoundaryTypes values; | |
| 91 | |||
| 92 | if constexpr (ParentType::isMomentumProblem()) | ||
| 93 | ✗ | values.setAllDirichlet(); | |
| 94 | else | ||
| 95 | { | ||
| 96 | 267200 | values.setAllNeumann(); | |
| 97 |
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1336000 | if (globalPos[1] > this->gridGeometry().bBoxMax()[1] - eps_) |
| 98 | { | ||
| 99 |
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66800 | if (useWholeLength_ || (globalPos[0] > 0.4 && globalPos[0] < 0.6)) |
| 100 | values.setAllDirichlet(); | ||
| 101 | } | ||
| 102 | |||
| 103 | } | ||
| 104 | |||
| 105 | 267200 | return values; | |
| 106 | } | ||
| 107 | |||
| 108 | /*! | ||
| 109 | * \brief Evaluates the boundary conditions for a Dirichlet control volume. | ||
| 110 | * | ||
| 111 | * \param globalPos The center of the finite volume which ought to be set. | ||
| 112 | */ | ||
| 113 | ✗ | DirichletValues dirichlet(const Element& element, const SubControlVolumeFace& scvf) const | |
| 114 | { | ||
| 115 | 29736 | const auto& globalPos = scvf.ipGlobal(); | |
| 116 | 29736 | DirichletValues values(0.0); | |
| 117 | |||
| 118 | if constexpr (!ParentType::isMomentumProblem()) | ||
| 119 | { | ||
| 120 |
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1576 | values[Indices::pressureIdx] = 1.1e+5; |
| 121 |
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1576 | if (useWholeLength_ || (globalPos[0] > 0.4 && globalPos[0] < 0.6)) |
| 122 | 3152 | values[Indices::conti0EqIdx + compIdx] = 1e-3; | |
| 123 | } | ||
| 124 | |||
| 125 |
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29736 | return values; |
| 126 | } | ||
| 127 | |||
| 128 | /*! | ||
| 129 | * \brief Evaluates the boundary conditions for a Neumann control volume. | ||
| 130 | * | ||
| 131 | * \param element The element for which the Neumann boundary condition is set | ||
| 132 | * \param fvGeometry The fvGeometry | ||
| 133 | * \param elemVolVars The element volume variables | ||
| 134 | * \param elemFaceVars The element face variables | ||
| 135 | * \param scvf The boundary sub control volume face | ||
| 136 | */ | ||
| 137 | template<class ElementVolumeVariables, class ElementFluxVariablesCache> | ||
| 138 | 193952 | BoundaryFluxes neumann(const Element& element, | |
| 139 | const FVElementGeometry& fvGeometry, | ||
| 140 | const ElementVolumeVariables& elemVolVars, | ||
| 141 | const ElementFluxVariablesCache& elemFluxVarsCache, | ||
| 142 | const SubControlVolumeFace& scvf) const | ||
| 143 | { | ||
| 144 | 193952 | BoundaryFluxes values(0.0); | |
| 145 | |||
| 146 | if constexpr (!ParentType::isMomentumProblem()) | ||
| 147 | { | ||
| 148 | 387904 | const auto insideDensity = elemVolVars[scvf.insideScvIdx()].density(); | |
| 149 | |||
| 150 | // The resulting flux over the boundary is zero anyway (velocity is zero), but this will add some non-zero derivatives to the | ||
| 151 | // Jacobian and makes the BC more general. | ||
| 152 | 581856 | values[Indices::conti0EqIdx] = this->faceVelocity(element, fvGeometry, scvf) * insideDensity * scvf.unitOuterNormal(); | |
| 153 | } | ||
| 154 | |||
| 155 | 193952 | return values; | |
| 156 | } | ||
| 157 | |||
| 158 | /*! | ||
| 159 | * \brief Evaluates the initial value for a control volume. | ||
| 160 | * | ||
| 161 | * \param globalPos The global position | ||
| 162 | */ | ||
| 163 | ✗ | InitialValues initialAtPos(const GlobalPosition& globalPos) const | |
| 164 | { | ||
| 165 | 3280 | InitialValues values(0.0); | |
| 166 | |||
| 167 | if constexpr (!ParentType::isMomentumProblem()) | ||
| 168 | ✗ | values[Indices::pressureIdx] = 1.1e5; | |
| 169 | |||
| 170 | 3280 | return values; | |
| 171 | } | ||
| 172 | |||
| 173 | void setTimeLoop(TimeLoopPtr timeLoop) | ||
| 174 |
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2 | { timeLoop_ = timeLoop; } |
| 175 | |||
| 176 | Scalar time() const | ||
| 177 | { return timeLoop_->time(); } | ||
| 178 | |||
| 179 | //! Enable internal Dirichlet constraints | ||
| 180 | static constexpr bool enableInternalDirichletConstraints() | ||
| 181 | { return !ParentType::isMomentumProblem(); } | ||
| 182 | |||
| 183 | /*! | ||
| 184 | * \brief Tag a degree of freedom to carry internal Dirichlet constraints. | ||
| 185 | * If true is returned for a dof, the equation for this dof is replaced | ||
| 186 | * by the constraint that its primary variable values must match the | ||
| 187 | * user-defined values obtained from the function internalDirichlet(), | ||
| 188 | * which must be defined in the problem. | ||
| 189 | * | ||
| 190 | * \param element The finite element | ||
| 191 | * \param scv The sub-control volume | ||
| 192 | */ | ||
| 193 | ✗ | std::bitset<DirichletValues::dimension> hasInternalDirichletConstraint(const Element& element, const SubControlVolume& scv) const | |
| 194 | { | ||
| 195 | 1280640 | std::bitset<DirichletValues::dimension> values; | |
| 196 | |||
| 197 | // the pure Neumann problem is only defined up to a constant | ||
| 198 | // we create a well-posed problem by fixing the pressure at one dof | ||
| 199 | |||
| 200 | if constexpr (!ParentType::isMomentumProblem()) | ||
| 201 | { | ||
| 202 |
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1280640 | const bool isLowerLeftCell = (scv.dofIndex() == 0); |
| 203 |
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1280640 | if (isLowerLeftCell) |
| 204 | 580 | values.set(0); | |
| 205 | } | ||
| 206 | |||
| 207 | ✗ | return values; | |
| 208 | } | ||
| 209 | |||
| 210 | /*! | ||
| 211 | * \brief Define the values of internal Dirichlet constraints for a degree of freedom. | ||
| 212 | * \param element The finite element | ||
| 213 | * \param scv The sub-control volume | ||
| 214 | */ | ||
| 215 | ✗ | DirichletValues internalDirichlet(const Element& element, const SubControlVolume& scv) const | |
| 216 | 371200 | { return DirichletValues(1.1e5); } | |
| 217 | |||
| 218 | private: | ||
| 219 | bool isInlet_(const GlobalPosition& globalPos) const | ||
| 220 | { return globalPos[0] < eps_; } | ||
| 221 | |||
| 222 | bool isOutlet_(const GlobalPosition& globalPos) const | ||
| 223 | { return globalPos[0] > this->gridGeometry().bBoxMax()[0] - eps_; } | ||
| 224 | |||
| 225 | const Scalar eps_; | ||
| 226 | bool useWholeLength_; | ||
| 227 | TimeLoopPtr timeLoop_; | ||
| 228 | }; | ||
| 229 | |||
| 230 | } // end namespace Dumux | ||
| 231 | #endif | ||
| 232 |