OilfieldToolsNet/opm-simulators
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adding parameter to control the min time step

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can be reduced to based on the newton iteration counts.

By default it is zero, so it should not change any running results.
This commit is contained in:
Kai Bao
2021-02-17 11:30:57 +01:00
parent 7e59532944
commit 347ca3978a
4 changed files with 45 additions and 7 deletions
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5
opm/simulators/timestepping/TimeStepControl.cpp
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@@ -175,11 +175,13 @@ namespace Opm
const double decayDampingFactor,
const double growthDampingFactor,
const double tol,
const double minTimeStepBasedOnIterations,
const bool verbose)
: PIDTimeStepControl( tol, verbose )
, target_iterations_( target_iterations )
, decayDampingFactor_( decayDampingFactor )
, growthDampingFactor_( growthDampingFactor )
, minTimeStepBasedOnIterations_(minTimeStepBasedOnIterations)
{}
double PIDAndIterationCountTimeStepControl::
@@ -192,6 +194,9 @@ namespace Opm
if (iterations > target_iterations_) {
double off_target_fraction = double(iterations - target_iterations_) / target_iterations_;
dtEstimateIter = dt / (1.0 + off_target_fraction * decayDampingFactor_);
if (dtEstimateIter < minTimeStepBasedOnIterations_) {
dtEstimateIter = minTimeStepBasedOnIterations_;
}
} else {
double off_target_fraction = double(target_iterations_ - iterations) / target_iterations_;
// Be a bit more careful when increasing.