1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 2011 OpenFOAM Foundation
7 -------------------------------------------------------------------------------
9 This file is part of OpenFOAM.
11 OpenFOAM is free software: you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by
13 the Free Software Foundation, either version 3 of the License, or
14 (at your option) any later version.
16 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 You should have received a copy of the GNU General Public License
22 along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
28 Reset the timestep to maintain a constant maximum courant and
29 diffusion Numbers. Reduction of time-step is immediate, but
30 increase is damped to avoid unstable oscillations.
32 \*---------------------------------------------------------------------------*/
46 scalar maxDeltaTFluid = maxCo/(CoNum + SMALL);
47 scalar maxDeltaTSolid = maxDi/(DiNum + SMALL);
52 min(maxDeltaTFluid, 1.0 + 0.1*maxDeltaTFluid),
60 min(deltaTFluid, maxDeltaTSolid)*runTime.deltaT().value(),
65 Info<< "deltaT = " << runTime.deltaT().value() << endl;
68 // ************************************************************************* //