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275 lines
12 KiB
C++
275 lines
12 KiB
C++
/*
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Copyright 2015, 2016 SINTEF ICT, Applied Mathematics.
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Copyright 2016 Statoil AS.
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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_BLACKOILSEQUENTIALMODEL_HEADER_INCLUDED
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#define OPM_BLACKOILSEQUENTIALMODEL_HEADER_INCLUDED
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#include <opm/autodiff/BlackoilModelBase.hpp>
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#include <opm/autodiff/BlackoilPressureModel.hpp>
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#include <opm/autodiff/BlackoilTransportModel.hpp>
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#include <opm/core/simulator/BlackoilState.hpp>
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#include <opm/autodiff/WellStateFullyImplicitBlackoil.hpp>
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#include <opm/autodiff/BlackoilModelParameters.hpp>
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namespace Opm {
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struct BlackoilSequentialModelParameters : public BlackoilModelParameters
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{
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bool iterate_to_fully_implicit;
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explicit BlackoilSequentialModelParameters( const parameter::ParameterGroup& param )
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: BlackoilModelParameters(param),
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iterate_to_fully_implicit(param.getDefault("iterate_to_fully_implicit", false))
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{
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}
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};
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/// A sequential splitting model implementation for three-phase black oil.
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template<class Grid, class WellModel>
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class BlackoilSequentialModel
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{
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public:
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typedef BlackoilState ReservoirState;
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typedef WellStateFullyImplicitBlackoil WellState;
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typedef BlackoilSequentialModelParameters ModelParameters;
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typedef DefaultBlackoilSolutionState SolutionState;
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/// Construct the model. It will retain references to the
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/// arguments of this functions, and they are expected to
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/// remain in scope for the lifetime of the solver.
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/// \param[in] param parameters
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/// \param[in] grid grid data structure
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/// \param[in] fluid fluid properties
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/// \param[in] geo rock properties
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/// \param[in] rock_comp_props if non-null, rock compressibility properties
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/// \param[in] wells well structure
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/// \param[in] vfp_properties Vertical flow performance tables
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/// \param[in] linsolver linear solver
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/// \param[in] eclState eclipse state
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/// \param[in] has_disgas turn on dissolved gas
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/// \param[in] has_vapoil turn on vaporized oil feature
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/// \param[in] terminal_output request output to cout/cerr
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BlackoilSequentialModel(const ModelParameters& param,
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const Grid& grid ,
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const BlackoilPropsAdInterface& fluid,
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const DerivedGeology& geo ,
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const RockCompressibility* rock_comp_props,
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const WellModel well_model,
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const NewtonIterationBlackoilInterface& linsolver,
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Opm::EclipseStateConstPtr eclState,
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const bool has_disgas,
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const bool has_vapoil,
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const bool terminal_output)
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: pressure_model_(new PressureModel(param, grid, fluid, geo, rock_comp_props, well_model,
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linsolver, eclState, has_disgas, has_vapoil, terminal_output)),
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transport_model_(new TransportModel(param, grid, fluid, geo, rock_comp_props, well_model,
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linsolver, eclState, has_disgas, has_vapoil, terminal_output)),
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pressure_solver_(typename PressureSolver::SolverParameters(), std::move(pressure_model_)),
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transport_solver_(typename TransportSolver::SolverParameters(), std::move(transport_model_)),
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initial_reservoir_state_(0, 0, 0), // will be overwritten
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iterate_to_fully_implicit_(param.iterate_to_fully_implicit)
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{
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}
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/// Called once before each time step.
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/// \param[in] dt time step size
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/// \param[in] reservoir_state reservoir state variables
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/// \param[in] well_state well state variables
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void prepareStep(const double /* dt */,
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const ReservoirState& reservoir_state,
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const WellState& well_state)
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{
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initial_reservoir_state_ = reservoir_state;
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initial_well_state_ = well_state;
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}
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/// Called once per nonlinear iteration.
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/// This model will first solve the pressure model to convergence, then the
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/// transport model.
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/// \param[in] iteration should be 0 for the first call of a new timestep
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/// \param[in] dt time step size
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/// \param[in] nonlinear_solver nonlinear solver used (for oscillation/relaxation control)
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/// \param[in, out] reservoir_state reservoir state variables
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/// \param[in, out] well_state well state variables
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template <class NonlinearSolverType>
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IterationReport nonlinearIteration(const int iteration,
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const double dt,
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NonlinearSolverType& /* nonlinear_solver */,
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ReservoirState& reservoir_state,
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WellState& well_state)
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{
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if (!iterate_to_fully_implicit_) {
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// Do a single pressure solve, followed by a single transport solve.
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if (terminalOutputEnabled()) {
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OpmLog::info("Using sequential model.");
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}
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// Pressure solve.
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if (terminalOutputEnabled()) {
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OpmLog::info("Solving the pressure equation.");
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}
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ReservoirState initial_state = reservoir_state;
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const int pressure_liniter = pressure_solver_.step(dt, reservoir_state, well_state);
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if (pressure_liniter == -1) {
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OPM_THROW(std::runtime_error, "Pressure solver failed to converge.");
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}
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// Transport solve.
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if (terminalOutputEnabled()) {
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OpmLog::info("Solving the transport equations.");
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}
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const int transport_liniter = transport_solver_.step(dt, initial_state, well_state, reservoir_state, well_state);
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if (transport_liniter == -1) {
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OPM_THROW(std::runtime_error, "Transport solver failed to converge.");
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}
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// Report and return.
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return IterationReport { false, true, pressure_liniter + transport_liniter, 0 };
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} else {
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// Iterate to fully implicit solution.
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// This call is just for a single iteration (one pressure and one transport solve),
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// we return a 'false' converged status if more are needed
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if (terminalOutputEnabled()) {
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OpmLog::info("Using sequential model in iterative mode, outer iteration " + std::to_string(iteration));
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}
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// Pressure solve.
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if (terminalOutputEnabled()) {
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OpmLog::info("Solving the pressure equation.");
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}
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const int pressure_liniter = pressure_solver_.step(dt, initial_reservoir_state_, initial_well_state_, reservoir_state, well_state);
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if (pressure_liniter == -1) {
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OPM_THROW(std::runtime_error, "Pressure solver failed to converge.");
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}
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// Transport solve.
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if (terminalOutputEnabled()) {
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OpmLog::info("Solving the transport equations.");
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}
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const int transport_liniter = transport_solver_.step(dt, initial_reservoir_state_, initial_well_state_, reservoir_state, well_state);
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if (transport_liniter == -1) {
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OPM_THROW(std::runtime_error, "Transport solver failed to converge.");
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}
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// Report and return.
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const bool converged = iteration >= 3; // TODO: replace this with a proper convergence check
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return IterationReport { false, converged, pressure_liniter + transport_liniter, 0 };
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}
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}
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/// Called once after each time step.
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/// In this class, this function does nothing.
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/// \param[in] dt time step size
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/// \param[in, out] reservoir_state reservoir state variables
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/// \param[in, out] well_state well state variables
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void afterStep(const double /* dt */,
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ReservoirState& /* reservoir_state */,
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WellState& /* well_state */)
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{
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}
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/// \brief Set threshold pressures that prevent or reduce flow.
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/// This prevents flow across faces if the potential
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/// difference is less than the threshold. If the potential
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/// difference is greater, the threshold value is subtracted
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/// before calculating flow. This is treated symmetrically, so
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/// flow is prevented or reduced in both directions equally.
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/// \param[in] threshold_pressures_by_face array of size equal to the number of faces
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/// of the grid passed in the constructor.
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void setThresholdPressures(const std::vector<double>& threshold_pressures_by_face)
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{
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pressure_solver_.model().setThresholdPressures(threshold_pressures_by_face);
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transport_solver_.model().setThresholdPressures(threshold_pressures_by_face);
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}
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/// Return true if output to cout is wanted.
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bool terminalOutputEnabled() const
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{
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return pressure_solver_.model().terminalOutputEnabled();
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}
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/// Return the relative change in variables relevant to this model.
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double relativeChange(const SimulationDataContainer& previous,
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const SimulationDataContainer& current ) const
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{
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// TODO: this is a quick stopgap implementation, and should be evaluated more carefully.
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return std::max(pressure_solver_.model().relativeChange(previous, current),
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transport_solver_.model().relativeChange(previous, current));
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}
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/// Return the well model
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const WellModel& wellModel() const
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{
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return pressure_model_->wellModel();
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}
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protected:
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typedef BlackoilPressureModel<Grid, WellModel> PressureModel;
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typedef BlackoilTransportModel<Grid, WellModel> TransportModel;
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typedef NonlinearSolver<PressureModel> PressureSolver;
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typedef NonlinearSolver<TransportModel> TransportSolver;
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std::unique_ptr<PressureModel> pressure_model_;
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std::unique_ptr<TransportModel> transport_model_;
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PressureSolver pressure_solver_;
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TransportSolver transport_solver_;
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ReservoirState initial_reservoir_state_;
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WellState initial_well_state_;
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bool iterate_to_fully_implicit_;
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};
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} // namespace Opm
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#endif // OPM_BLACKOILSEQUENTIALMODEL_HEADER_INCLUDED
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