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solvers: Adjust time step even if Courant number is zero

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This change means that even if the Courant number is zero, the time step
is adjusted based on maximum time step settings and/or constraints
specified by active fvModels. If none of these additional constraints
are present then adjustment is deactivated.
This commit is contained in:
Will Bainbridge
2023-01-25 13:53:00 +00:00
parent bc23162499
commit fcab778f57
13 changed files with 85 additions and 148 deletions
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15
applications/solvers/foamMultiRun/setDeltaT.C
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2022 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2022-2023 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -35,17 +35,19 @@ void Foam::setDeltaT(Time& runTime, const PtrList<solver>& solvers)
&& runTime.controlDict().lookupOrDefault("adjustTimeStep", false)
)
{
scalar deltaT = great;
bool transient = false;
scalar deltaT = vGreat;
forAll(solvers, i)
{
if (solvers[i].transient())
{
transient = true;
deltaT = min(deltaT, solvers[i].maxDeltaT());
}
}
if (deltaT != great)
if (transient && deltaT < rootVGreat)
{
runTime.setDeltaT(min(runTime.deltaTValue(), deltaT));
}
@ -58,9 +60,8 @@ void Foam::adjustDeltaT(Time& runTime, const PtrList<solver>& solvers)
// Update the time-step limited by the solvers maxDeltaT
if (runTime.controlDict().lookupOrDefault("adjustTimeStep", false))
{
scalar deltaT = 1.2*runTime.deltaTValue();
bool transient = false;
scalar deltaT = vGreat;
forAll(solvers, i)
{
@ -71,9 +72,9 @@ void Foam::adjustDeltaT(Time& runTime, const PtrList<solver>& solvers)
}
}
if (transient)
if (transient && deltaT < rootVGreat)
{
runTime.setDeltaT(deltaT);
runTime.setDeltaT(min(1.2*runTime.deltaTValue(), deltaT));
Info<< "deltaT = " << runTime.deltaTValue() << endl;
}
}