49 lines
1.8 KiB
C++
49 lines
1.8 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration | Website: https://openfoam.org
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\\ / A nd | Copyright (C) 2011-2022 OpenFOAM Foundation
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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Global
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setDeltaT
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Description
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Reset the timestep to maintain a constant maximum courant Number.
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Reduction of time-step is immediate, but increase is damped to avoid
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unstable oscillations.
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\*---------------------------------------------------------------------------*/
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if (adjustTimeStep)
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{
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scalar deltaT = maxCo*runTime.deltaTValue()/(CoNum + small);
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deltaT = min(deltaT, fvModels.maxDeltaT());
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deltaT = min
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(
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min(deltaT, runTime.deltaTValue() + 0.1*deltaT),
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1.2*runTime.deltaTValue()
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);
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runTime.setDeltaT(min(deltaT, maxDeltaT));
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Info<< "deltaT = " << runTime.deltaTValue() << endl;
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}
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// ************************************************************************* //
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