139 lines
5.1 KiB
C++
139 lines
5.1 KiB
C++
/*
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Copyright 2012 SINTEF ICT, Applied Mathematics.
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This file is part of the Open Porous Media project (OPM).
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OPM is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OPM is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OPM. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef OPM_VELOCITYINTERPOLATION_HEADER_INCLUDED
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#define OPM_VELOCITYINTERPOLATION_HEADER_INCLUDED
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#include <opm/core/utility/SparseTable.hpp>
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#include <vector>
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struct UnstructuredGrid;
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namespace Opm
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{
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/// Abstract interface for velocity interpolation method classes.
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class VelocityInterpolationInterface
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{
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public:
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virtual ~VelocityInterpolationInterface();
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/// Set up fluxes for interpolation.
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/// \param[in] flux One signed flux per face in the grid.
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virtual void setupFluxes(const double* flux) = 0;
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/// Interpolate velocity.
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/// \param[in] cell Cell in which to interpolate.
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/// \param[in] x Coordinates of point at which to interpolate.
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/// Must be array of length grid.dimensions.
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/// \param[out] v Interpolated velocity.
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/// Must be array of length grid.dimensions.
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virtual void interpolate(const int cell,
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const double* x,
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double* v) const = 0;
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};
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/// A constant velocity approximation. Will not actually interpolate
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/// unless the fluxes are consistent with a constant velocity.
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class VelocityInterpolationConstant : public VelocityInterpolationInterface
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{
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public:
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/// Constructor.
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/// \param[in] grid A grid.
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explicit VelocityInterpolationConstant(const UnstructuredGrid& grid);
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/// Set up fluxes for interpolation.
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/// \param[in] flux One signed flux per face in the grid.
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virtual void setupFluxes(const double* flux);
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/// Interpolate velocity.
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/// \param[in] cell Cell in which to interpolate.
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/// \param[in] x Coordinates of point at which to interpolate.
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/// Must be array of length grid.dimensions.
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/// \param[out] v Interpolated velocity.
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/// Must be array of length grid.dimensions.
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virtual void interpolate(const int cell,
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const double* x,
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double* v) const;
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private:
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const UnstructuredGrid& grid_;
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const double* flux_;
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};
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/// Interpolate velocity using the extended CVI scheme:
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/// compute a corner velocity for each cell corner that
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/// is consistent with fluxes of adjacent faces, then
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/// interpolate with generalized barycentric coordinates.
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class VelocityInterpolationECVI : public VelocityInterpolationInterface
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{
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public:
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/// Constructor.
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/// \param[in] grid A grid.
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VelocityInterpolationECVI(const UnstructuredGrid& grid);
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/// Set up fluxes for interpolation.
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/// \param[in] flux One signed flux per face in the grid.
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virtual void setupFluxes(const double* flux);
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/// Interpolate velocity.
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/// \param[in] cell Cell in which to interpolate.
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/// \param[in] x Coordinates of point at which to interpolate.
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/// Must be array of length grid.dimensions.
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/// \param[out] v Interpolated velocity.
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/// Must be array of length grid.dimensions.
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virtual void interpolate(const int cell,
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const double* x,
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double* v) const;
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private:
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const UnstructuredGrid& grid_;
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mutable std::vector<double> bary_coord_;
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enum { Maxdim = 3 };
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// A corner is here defined as a {cell, vertex} pair where the
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// vertex is adjacent to the cell.
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struct CornerInfo
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{
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int corner_id; // Unique for each corner.
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int vertex; // Shared between corners belonging to different cells.
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double volume; // Defined as det(N) where N is the matrix of adjacent face normals.
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double velocity[Maxdim]; // Computed corner velocity.
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};
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SparseTable<CornerInfo> corner_info_; // Corner info by cell.
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std::vector<int> adj_faces_; // Set of adjacent faces, by corner id. Contains dim face indices per corner.
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SparseTable<int> nonadj_faces_; // Set of nonadjacent faces, by corner id.
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void cartToBaryWachspress(const int cell,
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const double* x,
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double* xb) const;
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};
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} // namespace Opm
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#endif // OPM_VELOCITYINTERPOLATION_HEADER_INCLUDED
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