/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | foam-extend: Open Source CFD
\\ / O peration |
\\ / A nd | For copyright notice see file Copyright
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of foam-extend.
foam-extend 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.
foam-extend 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 foam-extend. 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 imediate but increase is damped to avoid
unstable oscillations.
\*---------------------------------------------------------------------------*/
if (adjustTimeStep)
{
scalar maxDeltaTFact = maxCo/(CoNum + StCoNum + SMALL);
scalar deltaTFact = min(min(maxDeltaTFact, 1.0 + 0.1*maxDeltaTFact), 1.2);
runTime.setDeltaT
(
min
deltaTFact*runTime.deltaT().value(),
maxDeltaT
)
);
Info<< "deltaT = " << runTime.deltaT().value() << endl;
}
// ************************************************************************* //
