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functionObjects::fluidMaxDeltaT: New functionObject to set the maximum Courant number and time-step

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at Function1s of time.

Underlying this new functionObject is a generalisation of the handling of the
maximum time-step in the modular solvers to allow complex user-specification of
the maximum time-step used in a simulation, not just the time-dependency
provided by fluidMaxDeltaT but functions of anything in the simulation by
creating a specialised functionObject in which the maxDeltaT function is
defined.

The chemical and combustion time-scale functionObjects adjustTimeStepToChemistry
and adjustTimeStepToCombustion have been updated and simplified using the above
mechanism.
This commit is contained in:
Henry Weller
2023-07-20 14:37:18 +01:00
parent 634b8d1cee
commit 2779442d2a
20 changed files with 432 additions and 111 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
applications/solvers/foamMultiRun/setDeltaT.C
View File

@ -47,6 +47,11 @@ void Foam::setDeltaT(Time& runTime, const PtrList<solver>& solvers)
}
}
if (transient)
{
deltaT = min(deltaT, runTime.functionObjects().maxDeltaT());
}
if (transient && deltaT < rootVGreat)
{
runTime.setDeltaT(min(runTime.deltaTValue(), deltaT));
@ -72,6 +77,11 @@ void Foam::adjustDeltaT(Time& runTime, const PtrList<solver>& solvers)
}
}
if (transient)
{
deltaT = min(deltaT, runTime.functionObjects().maxDeltaT());
}
if (transient && deltaT < rootVGreat)
{
runTime.setDeltaT

28
applications/solvers/foamRun/setDeltaT.C
View File

@ -34,10 +34,15 @@ void Foam::setDeltaT(Time& runTime, const solver& solver)
runTime.timeIndex() == 0
&& runTime.controlDict().lookupOrDefault("adjustTimeStep", false)
&& solver.transient()
&& solver.maxDeltaT() < rootVGreat
)
{
runTime.setDeltaT(min(runTime.deltaTValue(), solver.maxDeltaT()));
const scalar deltaT =
min(solver.maxDeltaT(), runTime.functionObjects().maxDeltaT());
if (deltaT < rootVGreat)
{
runTime.setDeltaT(min(runTime.deltaTValue(), deltaT));
}
}
}
@ -49,18 +54,19 @@ void Foam::adjustDeltaT(Time& runTime, const solver& solver)
(
runTime.controlDict().lookupOrDefault("adjustTimeStep", false)
&& solver.transient()
&& solver.maxDeltaT() < rootVGreat
)
{
runTime.setDeltaT
(
min
const scalar deltaT =
min(solver.maxDeltaT(), runTime.functionObjects().maxDeltaT());
if (deltaT < rootVGreat)
{
runTime.setDeltaT
(
solver::deltaTFactor*runTime.deltaTValue(),
solver.maxDeltaT()
)
);
Info<< "deltaT = " << runTime.deltaTValue() << endl;
min(solver::deltaTFactor*runTime.deltaTValue(), deltaT)
);
Info<< "deltaT = " << runTime.deltaTValue() << endl;
}
}
}