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https://github.com/OPM/opm-simulators.git
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306 lines
12 KiB
C++
306 lines
12 KiB
C++
// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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// vi: set et ts=4 sw=4 sts=4:
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/*
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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 2 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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Consult the COPYING file in the top-level source directory of this
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module for the precise wording of the license and the list of
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copyright holders.
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*/
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/*!
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* \file
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*
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* \copydoc Ewoms::EclThresholdPressure
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*/
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#ifndef EWOMS_ECL_THRESHOLD_PRESSURE_HH
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#define EWOMS_ECL_THRESHOLD_PRESSURE_HH
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#include <ewoms/common/propertysystem.hh>
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#include <opm/material/densead/Evaluation.hpp>
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#include <opm/material/densead/Math.hpp>
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#include <opm/parser/eclipse/Deck/Deck.hpp>
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#include <opm/parser/eclipse/EclipseState/EclipseState.hpp>
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#include <opm/parser/eclipse/EclipseState/Grid/GridProperty.hpp>
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#include <opm/parser/eclipse/EclipseState/Tables/Eqldims.hpp>
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#include <opm/parser/eclipse/EclipseState/SimulationConfig/SimulationConfig.hpp>
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#include <opm/parser/eclipse/EclipseState/SimulationConfig/ThresholdPressure.hpp>
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#include <opm/common/ErrorMacros.hpp>
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#include <opm/common/Exceptions.hpp>
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#include <dune/grid/common/gridenums.hh>
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#include <dune/common/version.hh>
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#include <array>
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#include <vector>
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#include <unordered_map>
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namespace Ewoms {
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namespace Properties {
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NEW_PROP_TAG(Simulator);
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NEW_PROP_TAG(Scalar);
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NEW_PROP_TAG(Evaluation);
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NEW_PROP_TAG(ElementContext);
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NEW_PROP_TAG(FluidSystem);
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}
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/*!
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* \ingroup EclBlackOilSimulator
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*
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* \brief This class calculates the threshold pressure for grid faces according to the
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* Eclipse Reference Manual.
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*
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* If the difference of the pressure potential between two cells is below the threshold
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* pressure, the pressure potential difference is assumed to be zero, if it is larger
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* than the threshold pressure, it is reduced by the threshold pressure.
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*/
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template <class TypeTag>
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class EclThresholdPressure
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{
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typedef typename GET_PROP_TYPE(TypeTag, Simulator) Simulator;
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typedef typename GET_PROP_TYPE(TypeTag, Scalar) Scalar;
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typedef typename GET_PROP_TYPE(TypeTag, Evaluation) Evaluation;
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typedef typename GET_PROP_TYPE(TypeTag, ElementContext) ElementContext;
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typedef typename GET_PROP_TYPE(TypeTag, FluidSystem) FluidSystem;
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enum { numPhases = FluidSystem::numPhases };
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public:
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EclThresholdPressure(const Simulator& simulator)
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: simulator_(simulator)
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{
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enableThresholdPressure_ = false;
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}
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/*!
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* \brief Actually compute the threshold pressures over a face as a pre-compute step.
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*/
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void finishInit()
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{
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const auto& gridView = simulator_.gridView();
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unsigned numElements = gridView.size(/*codim=*/0);
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// this code assumes that the DOFs are the elements. (i.e., an
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// ECFV spatial discretization with TPFA). if you try to use
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// it with something else, you're currently out of luck,
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// sorry!
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assert(simulator_.model().numGridDof() == numElements);
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const auto& gridManager = simulator_.gridManager();
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const auto& eclState = gridManager.eclState();
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const auto& simConfig = eclState.getSimulationConfig();
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enableThresholdPressure_ = simConfig.hasThresholdPressure();
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if (!enableThresholdPressure_)
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return;
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numEquilRegions_ = eclState.getTableManager().getEqldims().getNumEquilRegions();
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if (numEquilRegions_ > 0xff) {
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// make sure that the index of an equilibration region can be stored in a
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// single byte
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OPM_THROW(std::runtime_error,
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"The maximum number of supported equilibration regions is 255!");
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}
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// allocate the array which specifies the threshold pressures
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thpres_.resize(numEquilRegions_*numEquilRegions_, 0.0);
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thpresDefault_.resize(numEquilRegions_*numEquilRegions_, 0.0);
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// internalize the data specified using the EQLNUM keyword
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const std::vector<int>& equilRegionData =
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eclState.get3DProperties().getIntGridProperty("EQLNUM").getData();
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elemEquilRegion_.resize(numElements, 0);
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for (unsigned elemIdx = 0; elemIdx < numElements; ++elemIdx) {
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int cartElemIdx = gridManager.cartesianIndex(elemIdx);
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// ECL uses Fortran-style indices but we want C-style ones!
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elemEquilRegion_[elemIdx] = equilRegionData[cartElemIdx] - 1;
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}
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computeDefaultThresholdPressures_();
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applyExplicitThresholdPressures_();
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}
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/*!
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* \brief Returns the theshold pressure [Pa] for the intersection between two elements.
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*
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* This is tailor made for the E100 threshold pressure mechanism and it is thus quite
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* a hack: First of all threshold pressures in general are unphysical, and second,
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* they should be different for the fluid phase but are not. Anyway, this seems to be
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* E100's way of doing things, so we do it the same way.
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*/
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Scalar thresholdPressure(int elemIdx1, int elemIdx2) const
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{
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if (!enableThresholdPressure_)
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return 0.0;
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unsigned short equilRegion1Idx = elemEquilRegion_[elemIdx1];
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unsigned short equilRegion2Idx = elemEquilRegion_[elemIdx2];
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if (equilRegion1Idx == equilRegion2Idx)
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return 0.0;
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return thpres_[equilRegion1Idx*numEquilRegions_ + equilRegion2Idx];
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}
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private:
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// compute the defaults of the threshold pressures using the initial condition
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void computeDefaultThresholdPressures_()
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{
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const auto& gridManager = simulator_.gridManager();
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const auto& gridView = gridManager.gridView();
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typedef Opm::MathToolbox<Evaluation> Toolbox;
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// loop over the whole grid and compute the maximum gravity adjusted pressure
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// difference between two EQUIL regions.
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auto elemIt = gridView.template begin</*codim=*/ 0>();
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const auto& elemEndIt = gridView.template end</*codim=*/ 0>();
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ElementContext elemCtx(simulator_);
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for (; elemIt != elemEndIt; ++elemIt) {
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const auto& elem = *elemIt;
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if (elem.partitionType() != Dune::InteriorEntity)
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continue;
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elemCtx.updateAll(elem);
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const auto& stencil = elemCtx.stencil(/*timeIdx=*/0);
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for (unsigned scvfIdx = 0; scvfIdx < stencil.numInteriorFaces(); ++ scvfIdx) {
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const auto& face = stencil.interiorFace(scvfIdx);
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unsigned i = face.interiorIndex();
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unsigned j = face.exteriorIndex();
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unsigned insideElemIdx = elemCtx.globalSpaceIndex(i, /*timeIdx=*/0);
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unsigned outsideElemIdx = elemCtx.globalSpaceIndex(j, /*timeIdx=*/0);
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unsigned equilRegionInside = elemEquilRegion_[insideElemIdx];
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unsigned equilRegionOutside = elemEquilRegion_[outsideElemIdx];
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if (equilRegionInside == equilRegionOutside)
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// the current face is not at the boundary between EQUIL regions!
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continue;
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// don't include connections with negligible flow
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const Scalar& trans = simulator_.problem().transmissibility(elemCtx, i, j);
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const Scalar& faceArea = face.area();
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if ( std::abs(faceArea * trans) < 1e-18)
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continue;
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// determine the maximum difference of the pressure of any phase over the
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// intersection
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Scalar pth = 0.0;
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const auto& extQuants = elemCtx.extensiveQuantities(scvfIdx, /*timeIdx=*/0);
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for (unsigned phaseIdx = 0; phaseIdx < numPhases; ++phaseIdx) {
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unsigned upIdx = extQuants.upstreamIndex(phaseIdx);
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const auto& up = elemCtx.intensiveQuantities(upIdx, /*timeIdx=*/0);
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if (up.mobility(phaseIdx) > 0.0) {
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Scalar phaseVal = Toolbox::value(extQuants.pressureDifference(phaseIdx));
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pth = std::max(pth, std::abs(phaseVal));
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}
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}
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int offset1 = equilRegionInside*numEquilRegions_ + equilRegionOutside;
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int offset2 = equilRegionOutside*numEquilRegions_ + equilRegionInside;
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thpresDefault_[offset1] = std::max(thpresDefault_[offset1], pth);
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thpresDefault_[offset2] = std::max(thpresDefault_[offset2], pth);
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}
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}
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// make sure that the threshold pressures is consistent for parallel
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// runs. (i.e. take the maximum of all processes)
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for (unsigned i = 0; i < thpresDefault_.size(); ++i)
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thpresDefault_[i] = gridView.comm().max(thpresDefault_[i]);
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}
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// internalize the threshold pressures which where explicitly specified via the
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// THPRES keyword.
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void applyExplicitThresholdPressures_()
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{
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const auto& gridManager = simulator_.gridManager();
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const auto& gridView = gridManager.gridView();
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const auto& elementMapper = simulator_.model().elementMapper();
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const auto& eclState = simulator_.gridManager().eclState();
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const Opm::SimulationConfig& simConfig = eclState.getSimulationConfig();
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const auto& thpres = simConfig.getThresholdPressure();
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// set the threshold pressures for all EQUIL region boundaries which have a
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// intersection in the grid
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auto elemIt = gridView.template begin</*codim=*/ 0>();
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const auto& elemEndIt = gridView.template end</*codim=*/ 0>();
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for (; elemIt != elemEndIt; ++elemIt) {
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const auto& elem = *elemIt;
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if (elem.partitionType() != Dune::InteriorEntity)
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continue;
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auto isIt = gridView.ibegin(elem);
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const auto& isEndIt = gridView.iend(elem);
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for (; isIt != isEndIt; ++ isIt) {
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// store intersection, this might be costly
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const auto& intersection = *isIt;
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// ignore boundary intersections for now (TODO?)
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if (intersection.boundary())
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continue;
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const auto& inside = intersection.inside();
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const auto& outside = intersection.outside();
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unsigned insideElemIdx = elementMapper.index(inside);
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unsigned outsideElemIdx = elementMapper.index(outside);
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unsigned equilRegionInside = elemEquilRegion_[insideElemIdx];
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unsigned equilRegionOutside = elemEquilRegion_[outsideElemIdx];
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if (thpres.hasRegionBarrier(equilRegionInside + 1, equilRegionOutside + 1)) {
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Scalar pth = 0.0;
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if (thpres.hasThresholdPressure(equilRegionInside + 1, equilRegionOutside + 1)) {
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// threshold pressure explicitly specified
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pth = thpres.getThresholdPressure(equilRegionInside + 1, equilRegionOutside + 1);
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}
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else {
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// take the threshold pressure from the initial condition
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unsigned offset = equilRegionInside*numEquilRegions_ + equilRegionOutside;
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pth = thpresDefault_[offset];
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}
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unsigned offset1 = equilRegionInside*numEquilRegions_ + equilRegionOutside;
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unsigned offset2 = equilRegionOutside*numEquilRegions_ + equilRegionInside;
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thpres_[offset1] = pth;
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thpres_[offset2] = pth;
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}
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}
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}
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}
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const Simulator& simulator_;
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std::vector<Scalar> thpresDefault_;
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std::vector<Scalar> thpres_;
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unsigned numEquilRegions_;
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std::vector<unsigned char> elemEquilRegion_;
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bool enableThresholdPressure_;
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};
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} // namespace Ewoms
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#endif
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