OpenFOAM: API Guide
v2112
The open source CFD toolbox
setDeltaT.H
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | www.openfoam.com
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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Copyright (C) 2017 OpenCFD Ltd.
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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 maxDeltaTFact =
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min
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(
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maxCo
/(
CoNum
+ SMALL),
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min
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(
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maxAlphaCo
/(
alphaCoNum
+ SMALL),
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min
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(
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maxAlphaDdt
/(
ddtAlphaNum
+ SMALL),
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maxDi
/(
DiNum
+ SMALL)
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)
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)
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);
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scalar deltaTFact = min(min(maxDeltaTFact, 1.0 + 0.1*maxDeltaTFact), 1.2);
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runTime
.setDeltaT
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(
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min
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(
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deltaTFact*
runTime
.deltaTValue(),
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maxDeltaT
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)
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);
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Info<<
"deltaT = "
<<
runTime
.deltaTValue() << endl;
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}
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// ************************************************************************* //
maxDi
scalar maxDi
Definition:
createRegionControls.H:23
DiNum
scalar DiNum
Definition:
solidRegionDiffusionNo.H:1
runTime
engineTime & runTime
Definition:
createEngineTime.H:13
adjustTimeStep
bool adjustTimeStep
Definition:
createTimeControls.H:32
maxCo
scalar maxCo
Definition:
createTimeControls.H:35
ddtAlphaNum
scalar ddtAlphaNum
Definition:
alphaCourantNo.H:49
maxAlphaDdt
scalar maxAlphaDdt(runTime.controlDict().getOrDefault("maxAlphaDdt", GREAT))
alphaCoNum
scalar alphaCoNum
Definition:
alphaCourantNo.H:47
maxAlphaCo
scalar maxAlphaCo
Definition:
porousAlphaCourantNo.H:31
maxDeltaT
maxDeltaT
Definition:
readEngineTimeControls.H:3
CoNum
scalar CoNum
Definition:
compressibleCourantNo.H:31
applications
solvers
multiphase
icoReactingMultiphaseInterFoam
setDeltaT.H
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