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64 lines
2.1 KiB
C++
64 lines
2.1 KiB
C++
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/*
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Copyright 2015 SINTEF ICT, Applied Mathematics.
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Copyright 2015 Statoil ASA.
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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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#include <config.h>
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#include <opm/simulators/flow/NonlinearSolverEbos.hpp>
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#include <cmath>
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namespace Opm {
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namespace detail {
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void detectOscillations(const std::vector<std::vector<double>>& residualHistory,
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const int it, const int numPhases, const double relaxRelTol,
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bool& oscillate, bool& stagnate)
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{
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// The detection of oscillation in two primary variable results in the report of the detection
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// of oscillation for the solver.
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// Only the saturations are used for oscillation detection for the black oil model.
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// Stagnate is not used for any treatment here.
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if (it < 2) {
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oscillate = false;
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stagnate = false;
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return;
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}
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stagnate = true;
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int oscillatePhase = 0;
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const auto& F0 = residualHistory[it];
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const auto& F1 = residualHistory[it - 1];
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const auto& F2 = residualHistory[it - 2];
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for (int p = 0; p < numPhases; ++p) {
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const double d1 = std::abs((F0[p] - F2[p]) / F0[p]);
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const double d2 = std::abs((F0[p] - F1[p]) / F0[p]);
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oscillatePhase += (d1 < relaxRelTol) && (relaxRelTol < d2);
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// Process is 'stagnate' unless at least one phase
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// exhibits significant residual change.
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stagnate = (stagnate && !(std::abs((F1[p] - F2[p]) / F2[p]) > 1.0e-3));
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}
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oscillate = (oscillatePhase > 1);
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}
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} // namespace detail
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} // namespace Opm
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