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Merge pull request #3968 from totto82/drift_fix

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Adapt drift compensation code to the way Flow checks convergence.
This commit is contained in:
Markus Blatt 2022-08-18 11:39:25 +02:00 committed by GitHub
commit 3068424382
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2 changed files with 57 additions and 18 deletions
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6
compareECLFiles.cmake
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@ -1225,7 +1225,7 @@ add_test_compare_restarted_simulation(CASENAME spe9
ABS_TOL ${abs_tol_restart}
REL_TOL ${rel_tol_restart}
RESTART_STEP 15
TEST_ARGS --sched-restart=false)
TEST_ARGS --sched-restart=false --tolerance-mb=1e-7)
add_test_compare_restarted_simulation(CASENAME ctaquifer_2d_oilwater
FILENAME 2D_OW_CTAQUIFER
@ -1248,8 +1248,8 @@ add_test_compare_restarted_simulation(CASENAME fetkovich_2d
add_test_compare_restarted_simulation(CASENAME numerical_aquifer_3d_1aqu
FILENAME 3D_1AQU_3CELLS
SIMULATOR flow
ABS_TOL ${abs_tol_restart}
REL_TOL ${rel_tol_restart}
ABS_TOL 0.4
REL_TOL 4.0e-3
RESTART_STEP 3
DIR aquifer-num
TEST_ARGS --sched-restart=true --enable-tuning=true)

69
ebos/eclproblem.hh
View File

@ -884,6 +884,7 @@ public:
readEclRestartSolution_();
else
readInitialCondition_();
tracerModel_.prepareTracerBatches();
updatePffDofData_();
@ -897,6 +898,9 @@ public:
readBoundaryConditions_();
// compute and set eq weights based on initial b values
computeAndSetEqWeights_();
if (enableDriftCompensation_) {
drift_.resize(this->model().numGridDof());
drift_ = 0.0;
@ -1836,29 +1840,32 @@ public:
// if requested, compensate systematic mass loss for cells which were "well
// behaved" in the last time step
if (enableDriftCompensation_) {
// Note that we don't allow for drift compensation if there is
// no source terms i.e. no wells and no aquifers.
const auto& schedule = this->simulator().vanguard().schedule();
int episodeIdx = this->simulator().episodeIndex();
const auto& aquifer = this->simulator().vanguard().eclState().aquifer();
bool compensateDrift = schedule.numWells(episodeIdx) > 0 && aquifer.active();
if (enableDriftCompensation_ && compensateDrift) {
const auto& simulator = this->simulator();
const auto& model = this->model();
// we need a higher maxCompensation than the Newton tolerance because the
// current time step might be shorter than the last one
Scalar maxCompensation = 10.0*model.newtonMethod().tolerance();
// we use a lower tolerance for the compensation too
// assure the added drift from the last step does not
// cause convergence issues on the current step
Scalar maxCompensation = model.newtonMethod().tolerance()/10;
Scalar poro = this->porosity(globalDofIdx, timeIdx);
Scalar dt = simulator.timeStepSize();
EqVector dofDriftRate = drift_[globalDofIdx];
dofDriftRate /= dt*model.dofTotalVolume(globalDofIdx);
// compute the weighted total drift rate
Scalar totalDriftRate = 0.0;
for (unsigned eqIdx = 0; eqIdx < numEq; ++ eqIdx)
totalDriftRate +=
std::abs(dofDriftRate[eqIdx])*dt*model.eqWeight(globalDofIdx, eqIdx)/poro;
// make sure that we do not exceed the maximum rate of drift compensation
if (totalDriftRate > maxCompensation)
dofDriftRate *= maxCompensation/totalDriftRate;
// restrict drift compensation to the CNV tolerance
for (unsigned eqIdx = 0; eqIdx < numEq; ++ eqIdx) {
Scalar cnv = std::abs(dofDriftRate[eqIdx])*dt*model.eqWeight(globalDofIdx, eqIdx)/poro;
if (cnv > maxCompensation) {
dofDriftRate[eqIdx] *= maxCompensation/cnv;
}
}
for (unsigned eqIdx = 0; eqIdx < numEq; ++ eqIdx)
rate[eqIdx] -= dofDriftRate[eqIdx];
@ -2943,6 +2950,38 @@ private:
return dtNext;
}
void computeAndSetEqWeights_() {
std::vector<Scalar> sumInvB(numPhases, 0.0);
const auto& gridView = this->gridView();
ElementContext elemCtx(this->simulator());
for(const auto& elem: elements(gridView, Dune::Partitions::interior)) {
elemCtx.updatePrimaryStencil(elem);
int elemIdx = elemCtx.globalSpaceIndex(/*spaceIdx=*/0, /*timeIdx=*/0);
const auto& dofFluidState = initialFluidStates_[elemIdx];
for (unsigned phaseIdx = 0; phaseIdx < numPhases; ++phaseIdx) {
if (!FluidSystem::phaseIsActive(phaseIdx))
continue;
sumInvB[phaseIdx] += dofFluidState.invB(phaseIdx);
}
}
size_t numDof = this->model().numGridDof();
const auto& comm = this->simulator().vanguard().grid().comm();
comm.sum(sumInvB.data(),sumInvB.size());
Scalar numTotalDof = comm.sum(numDof);
for (unsigned phaseIdx = 0; phaseIdx < numPhases; ++phaseIdx) {
if (!FluidSystem::phaseIsActive(phaseIdx))
continue;
Scalar avgB = numTotalDof / sumInvB[phaseIdx];
unsigned solventCompIdx = FluidSystem::solventComponentIndex(phaseIdx);
unsigned activeSolventCompIdx = Indices::canonicalToActiveComponentIndex(solventCompIdx);
this->model().setEqWeight(activeSolventCompIdx, avgB);
}
}
typename Vanguard::TransmissibilityType transmissibilities_;
std::shared_ptr<EclMaterialLawManager> materialLawManager_;