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74 lines
3.0 KiB
C++
74 lines
3.0 KiB
C++
/*
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Copyright 2014 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_LINEARISEDBLACKOILRESIDUAL_HEADER_INCLUDED
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#define OPM_LINEARISEDBLACKOILRESIDUAL_HEADER_INCLUDED
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#include <opm/autodiff/AutoDiffBlock.hpp>
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namespace Opm
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{
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/// Residual structure of the fully implicit solver.
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/// All equations are given as AD types, with multiple
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/// jacobian blocks corresponding to the primary unknowns. The
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/// primary unknowns are for a three-phase simulation, in order:
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/// p (pressure)
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/// sw (water saturation)
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/// xvar (gas saturation, gas-oil ratio or oil-gas ratio)
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/// qs (well outflows by well and phase)
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/// bhp (bottom hole pressures)
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/// In the above, the xvar variable will have a different
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/// meaning from cell to cell, corresponding to the state in
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/// that cell (saturated, undersaturated oil or undersaturated
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/// gas). In a two-phase simulation, either sw or xvar is not
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/// used, depending on which phase is missing.
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///
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/// Note: this class is strongly coupled to the class
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/// FullyImplicitBlackoilSolver, and is separated from that
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/// class to facilitate the development of linear solver
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/// strategies outside that class.
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struct LinearisedBlackoilResidual {
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/// A type alias for the automatic differentiation type.
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typedef AutoDiffBlock<double> ADB;
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/// The material_balance_eq vector has one element for each
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/// active phase, each of which has size equal to the number
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/// of cells. Each material balance equation is given in terms
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/// of surface volumes (in SI units, that is standard m^3).
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std::vector<ADB> material_balance_eq;
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/// The well_flux_eq has size equal to the number of wells
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/// times the number of phases. It contains the well flow
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/// equations, relating the total well flows to
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/// bottom-hole pressures and reservoir conditions.
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ADB well_flux_eq;
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/// The well_eq has size equal to the number of wells. It
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/// contains the well control equations, that is for each
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/// well either a rate specification or bottom hole
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/// pressure specification.
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ADB well_eq;
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/// The size of the non-linear system.
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int sizeNonLinear() const;
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};
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} // namespace Opm
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#endif // OPM_LINEARISEDBLACKOILRESIDUAL_HEADER_INCLUDED
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