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/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
Global
setDeltaT
Description
Reset the timestep to maintain a constant maximum courant Number.
Reduction of time-step is immediate, but increase is damped to avoid
unstable oscillations.
\*---------------------------------------------------------------------------*/
if (adjustTimeStep)
{
scalar maxDeltaTFact =
min(maxCo/(CoNum + SMALL), maxAlphaCo/(alphaCoNum + SMALL));
scalar deltaTFact = min(min(maxDeltaTFact, 1.0 + 0.1*maxDeltaTFact), 1.2);
runTime.setDeltaT
(
min
(
deltaTFact*runTime.deltaTValue(),
maxDeltaT
)
);
Info<< "deltaT = " << runTime.deltaTValue() << endl;
}
// ************************************************************************* //