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41887508ea
When this boolean parameter is true (the default), tracer solutions will be normalized so that the tracer averages will sum to one in each cell. This behaviour is the same as before, the change is that it can now be turned off.
191 lines
9.6 KiB
C++
191 lines
9.6 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_TOFDISCGALREORDER_HEADER_INCLUDED
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#define OPM_TOFDISCGALREORDER_HEADER_INCLUDED
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#include <opm/core/transport/reorder/ReorderSolverInterface.hpp>
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#include <memory>
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#include <vector>
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#include <map>
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#include <ostream>
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struct UnstructuredGrid;
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namespace Opm
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{
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class IncompPropertiesInterface;
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class VelocityInterpolationInterface;
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class DGBasisInterface;
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namespace parameter { class ParameterGroup; }
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template <typename T> class SparseTable;
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/// Implements a discontinuous Galerkin solver for
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/// (single-phase) time-of-flight using reordering.
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/// The equation solved is:
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/// \f[v \cdot \nabla\tau = \phi\f]
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/// in which \f$ v \f$ is the fluid velocity, \f$ \tau \f$ is time-of-flight and
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/// \f$ \phi \f$ is the porosity. This is a boundary value problem, and
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/// \f$ \tau \f$ is specified to be zero on all inflow boundaries.
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/// The user may specify the polynomial degree of the basis function space
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/// used, but only degrees 0 and 1 are supported so far.
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class TofDiscGalReorder : public ReorderSolverInterface
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{
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public:
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/// Construct solver.
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/// \param[in] grid A 2d or 3d grid.
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/// \param[in] param Parameters for the solver.
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/// The following parameters are accepted (defaults):\n
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/// - \c dg_degree (0) -- Polynomial degree of basis functions.
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/// - \c use_tensorial_basis (false) -- Use tensor-product basis, interpreting dg_degree as
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/// bi/tri-degree not total degree.
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/// - \c use_cvi (false) -- Use ECVI velocity interpolation.
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/// - \c use_limiter (false) -- Use a slope limiter. If true, the next three parameters are used.
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/// - \c limiter_relative_flux_threshold (1e-3) -- Ignore upstream fluxes below this threshold,
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/// relative to total cell flux.
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/// - \c limiter_method ("MinUpwindFace") -- Limiter method used. Accepted methods are:
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/// - MinUpwindFace -- Limit cell tof to >= inflow face tofs.
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/// - MinUpwindAverage -- Limit cell tof to >= inflow cell average tofs.
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/// - \c limiter_usage ("DuringComputations") -- Usage pattern for limiter. Accepted choices are:
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/// - DuringComputations -- Apply limiter to cells as they are computed,
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/// so downstream cells' solutions may be affected
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/// by limiting in upstream cells.
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/// - AsPostProcess -- Apply in dependency order, but only after
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/// computing (unlimited) solution.
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/// - AsSimultaneousPostProcess -- Apply to each cell independently, using un-
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/// limited solution in neighbouring cells.
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TofDiscGalReorder(const UnstructuredGrid& grid,
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const parameter::ParameterGroup& param);
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/// Solve for time-of-flight.
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/// \param[in] darcyflux Array of signed face fluxes.
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/// \param[in] porevolume Array of pore volumes.
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/// \param[in] source Source term. Sign convention is:
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/// (+) inflow flux,
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/// (-) outflow flux.
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/// \param[out] tof_coeff Array of time-of-flight solution coefficients.
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/// The values are ordered by cell, meaning that
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/// the K coefficients corresponding to the first
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/// cell come before the K coefficients corresponding
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/// to the second cell etc.
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/// K depends on degree and grid dimension.
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void solveTof(const double* darcyflux,
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const double* porevolume,
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const double* source,
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std::vector<double>& tof_coeff);
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/// Solve for time-of-flight and a number of tracers.
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/// \param[in] darcyflux Array of signed face fluxes.
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/// \param[in] porevolume Array of pore volumes.
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/// \param[in] source Source term. Sign convention is:
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/// (+) inflow flux,
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/// (-) outflow flux.
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/// \param[in] tracerheads Table containing one row per tracer, and each
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/// row contains the source cells for that tracer.
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/// \param[out] tof_coeff Array of time-of-flight solution coefficients.
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/// The values are ordered by cell, meaning that
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/// the K coefficients corresponding to the first
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/// cell comes before the K coefficients corresponding
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/// to the second cell etc.
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/// K depends on degree and grid dimension.
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/// \param[out] tracer_coeff Array of tracer solution coefficients. N*K per cell,
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/// where N is equal to tracerheads.size(). All K coefs
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/// for a tracer are consecutive, and all tracers' coefs
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/// for a cell come before those for the next cell.
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void solveTofTracer(const double* darcyflux,
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const double* porevolume,
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const double* source,
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const SparseTable<int>& tracerheads,
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std::vector<double>& tof_coeff,
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std::vector<double>& tracer_coeff);
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private:
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virtual void solveSingleCell(const int cell);
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virtual void solveMultiCell(const int num_cells, const int* cells);
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void cellContribs(const int cell);
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void faceContribs(const int cell);
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void solveLinearSystem(const int cell);
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private:
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// Disable copying and assignment.
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TofDiscGalReorder(const TofDiscGalReorder&);
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TofDiscGalReorder& operator=(const TofDiscGalReorder&);
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// Data members
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const UnstructuredGrid& grid_;
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std::shared_ptr<VelocityInterpolationInterface> velocity_interpolation_;
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bool use_cvi_;
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bool use_limiter_;
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double limiter_relative_flux_threshold_;
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enum LimiterMethod { MinUpwindFace, MinUpwindAverage };
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LimiterMethod limiter_method_;
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enum LimiterUsage { DuringComputations, AsPostProcess, AsSimultaneousPostProcess };
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LimiterUsage limiter_usage_;
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const double* darcyflux_; // one flux per grid face
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const double* porevolume_; // one volume per cell
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const double* source_; // one volumetric source term per cell
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std::shared_ptr<DGBasisInterface> basis_func_;
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double* tof_coeff_;
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// For tracers.
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double* tracer_coeff_;
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int num_tracers_;
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enum { NoTracerHead = -1 };
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std::vector<int> tracerhead_by_cell_;
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bool tracers_ensure_unity_;
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// Used by solveSingleCell().
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std::vector<double> rhs_; // single-cell right-hand-sides
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std::vector<double> jac_; // single-cell jacobian
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std::vector<double> orig_rhs_; // single-cell right-hand-sides (copy)
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std::vector<double> orig_jac_; // single-cell jacobian (copy)
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std::vector<double> coord_;
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mutable std::vector<double> basis_;
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mutable std::vector<double> basis_nb_;
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std::vector<double> grad_basis_;
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std::vector<double> velocity_;
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int num_singlesolves_;
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// Used by solveMultiCell():
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double gauss_seidel_tol_;
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int num_multicell_;
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int max_size_multicell_;
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int max_iter_multicell_;
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// Private methods
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// Apply some limiter, writing to array tof
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// (will read data from tof_coeff_, it is ok to call
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// with tof_coeff as tof argument.
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void applyLimiter(const int cell, double* tof);
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void applyMinUpwindLimiter(const int cell, const bool face_min, double* tof);
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void applyLimiterAsPostProcess();
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void applyLimiterAsSimultaneousPostProcess();
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double totalFlux(const int cell) const;
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double minCornerVal(const int cell, const int face) const;
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// Apply a simple (restrict to [0,1]) limiter.
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// Intended for tracers.
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void applyTracerLimiter(const int cell, double* local_coeff);
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};
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} // namespace Opm
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#endif // OPM_TRANSPORTMODELTRACERTOFDISCGAL_HEADER_INCLUDED
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