setDeltaT.H
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5 \\ / A nd | www.openfoam.com
6 \\/ M anipulation |
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25
26Global
27 setDeltaT
28
29Description
30 Reset the timestep to maintain a constant maximum courant Number.
31 Reduction of time-step is immediate but increase is damped to avoid
32 unstable oscillations.
34\*---------------------------------------------------------------------------*/
35
37{
38 scalar maxDeltaTFact =
39 min(maxCo/(CoNum + SMALL), maxAcousticCo/(acousticCoNum + SMALL));
40
41 scalar deltaTFact = min(min(maxDeltaTFact, 1.0 + 0.1*maxDeltaTFact), 1.2);
42
43 runTime.setDeltaT
44 (
45 min
46 (
47 deltaTFact*runTime.deltaTValue(),
49 )
50 );
51
52 Info<< "deltaT = " << runTime.deltaTValue() << endl;
53}
54
55// ************************************************************************* //
scalar acousticCoNum
Definition: CourantNo.H:33
engineTime & runTime
bool adjustTimeStep
scalar maxCo
maxAcousticCo
Definition: readControls.H:4
scalar CoNum