1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | foam-extend: Open Source CFD
4 \\ / O peration | Version: 3.2
5 \\ / A nd | Web: http://www.foam-extend.org
6 \\/ M anipulation | For copyright notice see file Copyright
7 -------------------------------------------------------------------------------
9 This file is part of foam-extend.
11 foam-extend is free software: you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by the
13 Free Software Foundation, either version 3 of the License, or (at your
14 option) any later version.
16 foam-extend is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with foam-extend. If not, see <http://www.gnu.org/licenses/>.
28 Reset the timestep to maintain a constant maximum courant Number.
29 Reduction of time-step is imediate but increase is damped to avoid
30 unstable oscillations.
32 \*---------------------------------------------------------------------------*/
36 scalar maxDeltaTFact =
37 min(maxCo/(CoNum + SMALL), maxAcousticCo/(acousticCoNum + SMALL));
39 scalar deltaTFact = min(min(maxDeltaTFact, 1.0 + 0.1*maxDeltaTFact), 1.2);
45 deltaTFact*runTime.deltaT().value(),
50 Info<< "deltaT = " << runTime.deltaT().value() << endl;
53 // ************************************************************************* //