opm-simulators/opm/simulators/linalg/PressureTransferPolicy.hpp

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/*
Copyright 2019 SINTEF Digital, Mathematics and Cybernetics.
Copyright 2019 Dr. Blatt - HPC-Simulation-Software & Services.
This file is part of the Open Porous Media project (OPM).
OPM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OPM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OPM. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef OPM_PRESSURE_TRANSFER_POLICY_HEADER_INCLUDED
#define OPM_PRESSURE_TRANSFER_POLICY_HEADER_INCLUDED
#include <opm/simulators/linalg/twolevelmethodcpr.hh>
namespace Opm
{
template <class FineOperator, class CoarseOperator, class Communication, bool transpose = false>
class PressureTransferPolicy : public Dune::Amg::LevelTransferPolicyCpr<FineOperator, CoarseOperator>
{
public:
typedef Dune::Amg::LevelTransferPolicyCpr<FineOperator, CoarseOperator> ParentType;
typedef Communication ParallelInformation;
typedef typename FineOperator::domain_type FineVectorType;
public:
PressureTransferPolicy(const Communication& comm, const FineVectorType& weights, int pressure_var_index)
: communication_(&const_cast<Communication&>(comm))
, weights_(weights)
, pressure_var_index_(pressure_var_index)
{
}
virtual void createCoarseLevelSystem(const FineOperator& fineOperator) override
{
using CoarseMatrix = typename CoarseOperator::matrix_type;
const auto& fineLevelMatrix = fineOperator.getmat();
coarseLevelMatrix_.reset(new CoarseMatrix(fineLevelMatrix.N(), fineLevelMatrix.M(), CoarseMatrix::row_wise));
auto createIter = coarseLevelMatrix_->createbegin();
for (const auto& row : fineLevelMatrix) {
for (auto col = row.begin(), cend = row.end(); col != cend; ++col) {
createIter.insert(col.index());
}
++createIter;
}
calculateCoarseEntries(fineOperator);
coarseLevelCommunication_.reset(communication_, [](Communication*) {});
this->lhs_.resize(this->coarseLevelMatrix_->M());
this->rhs_.resize(this->coarseLevelMatrix_->N());
using OperatorArgs = typename Dune::Amg::ConstructionTraits<CoarseOperator>::Arguments;
#if DUNE_VERSION_NEWER(DUNE_ISTL, 2, 7)
OperatorArgs oargs(coarseLevelMatrix_, *coarseLevelCommunication_);
this->operator_ = Dune::Amg::ConstructionTraits<CoarseOperator>::construct(oargs);
#else
OperatorArgs oargs(*coarseLevelMatrix_, *coarseLevelCommunication_);
this->operator_.reset(Dune::Amg::ConstructionTraits<CoarseOperator>::construct(oargs));
#endif
}
virtual void calculateCoarseEntries(const FineOperator& fineOperator) override
{
const auto& fineMatrix = fineOperator.getmat();
*coarseLevelMatrix_ = 0;
auto rowCoarse = coarseLevelMatrix_->begin();
for (auto row = fineMatrix.begin(), rowEnd = fineMatrix.end(); row != rowEnd; ++row, ++rowCoarse) {
assert(row.index() == rowCoarse.index());
auto entryCoarse = rowCoarse->begin();
for (auto entry = row->begin(), entryEnd = row->end(); entry != entryEnd; ++entry, ++entryCoarse) {
assert(entry.index() == entryCoarse.index());
double matrix_el = 0;
if (transpose) {
auto bw = weights_[entry.index()];
for (size_t i = 0; i < bw.size(); ++i) {
matrix_el += (*entry)[pressure_var_index_][i] * bw[i];
}
} else {
auto bw = weights_[row.index()];
for (size_t i = 0; i < bw.size(); ++i) {
matrix_el += (*entry)[i][pressure_var_index_] * bw[i];
}
}
(*entryCoarse) = matrix_el;
}
}
assert(rowCoarse == coarseLevelMatrix_->end());
}
virtual void moveToCoarseLevel(const typename ParentType::FineRangeType& fine) override
{
// Set coarse vector to zero
this->rhs_ = 0;
auto end = fine.end(), begin = fine.begin();
for (auto block = begin; block != end; ++block) {
auto bw = weights_[block.index()];
double rhs_el = 0.0;
if (transpose) {
rhs_el = (*block)[pressure_var_index_];
} else {
for (size_t i = 0; i < block->size(); ++i) {
rhs_el += (*block)[i] * bw[i];
}
}
this->rhs_[block - begin] = rhs_el;
}
this->lhs_ = 0;
}
virtual void moveToFineLevel(typename ParentType::FineDomainType& fine) override
{
auto end = fine.end(), begin = fine.begin();
for (auto block = begin; block != end; ++block) {
if (transpose) {
auto bw = weights_[block.index()];
for (size_t i = 0; i < block->size(); ++i) {
(*block)[i] = this->lhs_[block - begin] * bw[i];
}
} else {
(*block)[pressure_var_index_] = this->lhs_[block - begin];
}
}
}
virtual PressureTransferPolicy* clone() const override
{
return new PressureTransferPolicy(*this);
}
const Communication& getCoarseLevelCommunication() const
{
return *coarseLevelCommunication_;
}
private:
Communication* communication_;
const FineVectorType& weights_;
const int pressure_var_index_;
std::shared_ptr<Communication> coarseLevelCommunication_;
std::shared_ptr<typename CoarseOperator::matrix_type> coarseLevelMatrix_;
};
} // namespace Opm
#endif // OPM_PRESSURE_TRANSFER_POLICY_HEADER_INCLUDED