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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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13
applications/solvers/modules/solid/solid.C
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@ -47,7 +47,7 @@ void Foam::solvers::solid::readControls()
runTime.controlDict().lookupOrDefault<scalar>("maxDi", 1.0);
maxDeltaT_ =
runTime.controlDict().lookupOrDefault<scalar>("maxDeltaT", great);
runTime.controlDict().lookupOrDefault<scalar>("maxDeltaT", vGreat);
}
@ -131,15 +131,14 @@ Foam::solvers::solid::~solid()
Foam::scalar Foam::solvers::solid::maxDeltaT() const
{
scalar deltaT = min(fvModels().maxDeltaT(), maxDeltaT_);
if (DiNum > small)
{
const scalar deltaT = maxDi*runTime.deltaTValue()/DiNum;
return min(min(deltaT, fvModels().maxDeltaT()), maxDeltaT_);
}
else
{
return maxDeltaT_;
deltaT = min(deltaT, maxDi/DiNum*runTime.deltaTValue());
}
return deltaT;
}