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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-FileCopyrightText: Copyright © DuMux Project contributors, see AUTHORS.md in root folder | ||
| 5 | // SPDX-License-Identifier: GPL-3.0-or-later | ||
| 6 | // | ||
| 7 | |||
| 8 | #ifndef DUMUX_ONEP_TEST_PROBLEM_HH | ||
| 9 | #define DUMUX_ONEP_TEST_PROBLEM_HH | ||
| 10 | |||
| 11 | // ## Initial and boundary conditions (`problem_1p.hh`) | ||
| 12 | // | ||
| 13 | // This file contains the __problem class__ which defines the initial and boundary | ||
| 14 | // conditions for the single-phase flow simulation. | ||
| 15 | // | ||
| 16 | // [[content]] | ||
| 17 | // | ||
| 18 | // ### Include files | ||
| 19 | // | ||
| 20 | // Include the `PorousMediumFlowProblem` class, the base | ||
| 21 | // class from which we will derive. | ||
| 22 | #include <dumux/porousmediumflow/problem.hh> | ||
| 23 | // Include the `BoundaryTypes` class which specifies the boundary types set in this problem. | ||
| 24 | #include <dumux/common/boundarytypes.hh> | ||
| 25 | |||
| 26 | // ### The problem class | ||
| 27 | // We enter the problem class where all necessary boundary and initial conditions are set for our simulation. | ||
| 28 | // As we are solving a problem related to flow in porous media, we inherit from the base class `PorousMediumFlowProblem`. | ||
| 29 | // [[codeblock]] | ||
| 30 | namespace Dumux { | ||
| 31 | |||
| 32 | template<class TypeTag> | ||
| 33 | 1 | class OnePTestProblem : public PorousMediumFlowProblem<TypeTag> | |
| 34 | { | ||
| 35 | // A few convenience aliases used throughout this class. | ||
| 36 | using ParentType = PorousMediumFlowProblem<TypeTag>; | ||
| 37 | using GridView = typename GetPropType<TypeTag, Properties::GridGeometry>::GridView; | ||
| 38 | using Element = typename GridView::template Codim<0>::Entity; | ||
| 39 | using GlobalPosition = typename Element::Geometry::GlobalCoordinate; | ||
| 40 | |||
| 41 | using Scalar = GetPropType<TypeTag, Properties::Scalar>; | ||
| 42 | using PrimaryVariables = GetPropType<TypeTag, Properties::PrimaryVariables>; | ||
| 43 | using FVElementGeometry = typename GetPropType<TypeTag, Properties::GridGeometry>::LocalView; | ||
| 44 | using SubControlVolumeFace = typename FVElementGeometry::SubControlVolumeFace; | ||
| 45 | using GridGeometry = GetPropType<TypeTag, Properties::GridGeometry>; | ||
| 46 | using BoundaryTypes = Dumux::BoundaryTypes<PrimaryVariables::size()>; | ||
| 47 | |||
| 48 | static constexpr int dimWorld = GridView::dimensionworld; | ||
| 49 | |||
| 50 | public: | ||
| 51 | // This is the constructor of our problem class: | ||
| 52 | 1 | OnePTestProblem(std::shared_ptr<const GridGeometry> gridGeometry) | |
| 53 |
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3 | : ParentType(gridGeometry) {} |
| 54 | // [[/codeblock]] | ||
| 55 | |||
| 56 | // #### Boundary conditions | ||
| 57 | // With the following function we define the __type of boundary conditions__ depending on the location. | ||
| 58 | // Two types of boundary conditions can be specified: Dirichlet or Neumann boundary conditions. On | ||
| 59 | // Dirichlet boundaries, the values of the primary variables need to be fixed. On a Neumann boundaries, | ||
| 60 | // values for derivatives need to be fixed. Mixed boundary conditions (different types for different | ||
| 61 | // equations on the same boundary) are not accepted for cell-centered finite volume schemes. | ||
| 62 | // [[codeblock]] | ||
| 63 | 1400 | BoundaryTypes boundaryTypesAtPos(const GlobalPosition& globalPos) const | |
| 64 | { | ||
| 65 | // we define a small epsilon value | ||
| 66 |
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1400 | Scalar eps = 1.0e-6; |
| 67 | |||
| 68 | // Initially, set Neumann boundary conditions for all equations. | ||
| 69 |
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1400 | BoundaryTypes values; |
| 70 | 1400 | values.setAllNeumann(); | |
| 71 | |||
| 72 | // On the top and bottom, use Dirichlet boundary conditions to prescribe pressures later. | ||
| 73 |
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1400 | const auto yMax = this->gridGeometry().bBoxMax()[dimWorld-1]; |
| 74 |
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1400 | if (globalPos[dimWorld-1] < eps || globalPos[dimWorld-1] > yMax - eps) |
| 75 | values.setAllDirichlet(); | ||
| 76 | |||
| 77 | return values; | ||
| 78 | } | ||
| 79 | // [[/codeblock]] | ||
| 80 | |||
| 81 | // The following function specifies the __values on Dirichlet boundaries__. | ||
| 82 | // We need to define values for the primary variable (pressure), for which we | ||
| 83 | // set a pressure of 1.1 bar and 1 bar at the bottom and top boundaries, respectively. | ||
| 84 | // [[codeblock]] | ||
| 85 | 400 | PrimaryVariables dirichletAtPos(const GlobalPosition& globalPos) const | |
| 86 | { | ||
| 87 | // Instantiate a primary variables object | ||
| 88 |
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400 | PrimaryVariables values; |
| 89 | |||
| 90 | // and assign a pressure value in [Pa] such that at the bottom boundary | ||
| 91 | // a pressure of 1.1 bar is set, and on the top boundary a pressure of 1 bar. | ||
| 92 |
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400 | values[0] = 1.0e5*(1.1 - globalPos[dimWorld-1]*0.1); |
| 93 | return values; | ||
| 94 | } | ||
| 95 | |||
| 96 | }; // end class definition of OnePTestProblem | ||
| 97 | } // end namespace Dumux | ||
| 98 | // [[/codeblock]] | ||
| 99 | // [[/content]] | ||
| 100 | #endif | ||
| 101 |