67ab0b5abd
- in FOAM library updated containers backported PackedBoolList, hashedWordList, nullObject, wordRe, backported functions to backported int32 support backported tableReaders backported Function1, TimeFunction1 backported dynamicCode (for codedBCs, ...) -- needs to be mapped out advanced error macros (FatalIOErrorInFunction, ...) -- needs to be mapped out backported IOobject::MUST_READ_IF_MODIFIED and added IOobject::READ_IF_PRESENT_IF_MODIFIED (only in FO) - in postProcessing backported IO FOs (partialWrite, removeRegisteredObject, writeDictionary, writeRegisteredObject) backported field FOs (fieldCoordinateSystemTransform, fieldValues, nearWallFields, processorField, readFields, regionSizeDistribution, streamLine, wallBoundedStreamLine) backported fvTools FOs (calcFvcDiv, calcFvcGrad, calcMag) backported jobControl FOs (abortCalculation) backported utilities FOs (ourantNo, Lambda2, Peclet, Q, codedFunctionObject, pressureTools, residuals, scalarTransport, setTimeStep, timeActivatedFileUpdate, turbulenceFields, vorticity, wallShearStress)
82 lines
2.5 KiB
C++
82 lines
2.5 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 4.0
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\\ / A nd | Web: http://www.foam-extend.org
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\\/ M anipulation | For copyright notice see file Copyright
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-------------------------------------------------------------------------------
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License
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This file is part of foam-extend.
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foam-extend 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 the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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foam-extend is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License 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 foam-extend. 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 low number of Picard iteration and a good
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convergence. Reduction of time-step is immediate, but increase is damped to
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avoid unstable oscillations.
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\*---------------------------------------------------------------------------*/
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scalar deltaTFact = 1.;
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if (adjustTimeStep)
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{
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deltaTFact = 1.;
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// If There is a too high number of Picard iteration, decrease of the time
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// step.
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if (currentPicard > nIterPicard-2)
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{
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deltaTFact = 1./tFact;
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}
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if (currentPicard >= 3)
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{
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sc = 0;
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}
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if ((currentPicard < 3) && (sc < stabilisationThreshold))
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{
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sc = sc+1;
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}
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// If there is more than 'stabilisationThreshold' iteration that the number
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// of Picard iteration is low, increase of the time step.
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if ((currentPicard < 3) && (sc == stabilisationThreshold))
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{
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deltaTFact = tFact;
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sc = 0;
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}
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// Reset of the time step if needed (time step is always lower than
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// 'maxDeltaT').
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if (deltaTFact != 1.)
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{
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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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}
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Info<< "deltaT = " << runTime.deltaTValue() << endl;
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}
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// ************************************************************************* //
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