06893a0bc6
Much of the VoF functionality, particularly relating to momentum solution, is independent of the number of phases and it is useful to hold this generic VoF data and functionality in an abstract base-class and derive twoPhaseVoFSolver and multiphaseVoFSolver from it, adding two-phase and multiphase functionality respectively.
102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration | Website: https://openfoam.org
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\\ / A nd | Copyright (C) 2022-2023 OpenFOAM Foundation
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\\/ M anipulation |
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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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\*---------------------------------------------------------------------------*/
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#include "VoFSolver.H"
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#include "fvcSurfaceIntegrate.H"
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// * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
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void Foam::solvers::VoFSolver::setRDeltaT()
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{
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volScalarField& rDeltaT = trDeltaT.ref();
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const dictionary& pimpleDict = pimple.dict();
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const scalar maxCo
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(
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pimpleDict.lookupOrDefault<scalar>("maxCo", 0.9)
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);
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const scalar maxDeltaT
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(
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pimpleDict.lookupOrDefault<scalar>("maxDeltaT", great)
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);
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const scalar minDeltaT
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(
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pimpleDict.lookupOrDefault<scalar>("minDeltaT", small)
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);
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const volScalarField rDeltaT0("rDeltaT0", rDeltaT);
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// Set the reciprocal time-step from the local Courant number
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// and maximum and minimum time-steps
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rDeltaT.ref() = min
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(
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1/dimensionedScalar(dimTime, minDeltaT),
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max
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(
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1/dimensionedScalar(dimTime, maxDeltaT),
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fvc::surfaceSum(mag(phi))()()
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/((2*maxCo)*mesh.V())
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)
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);
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Info<< "Flow time scale min/max = "
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<< gMin(1/rDeltaT.primitiveField())
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<< ", " << gMax(1/rDeltaT.primitiveField()) << endl;
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setInterfaceRDeltaT(rDeltaT);
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// Limit rate of change of time scale
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// - reduce as much as required
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// - only increase at a fraction of old time scale
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if
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(
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pimpleDict.found("rDeltaTDampingCoeff")
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&& runTime.timeIndex() > runTime.startTimeIndex() + 1
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)
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{
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// Damping coefficient (1-0)
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const scalar rDeltaTDampingCoeff
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(
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pimpleDict.lookup<scalar>("rDeltaTDampingCoeff")
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);
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rDeltaT = max
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(
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rDeltaT,
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(scalar(1) - rDeltaTDampingCoeff)*rDeltaT0
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);
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Info<< "Damped flow time scale min/max = "
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<< gMin(1/rDeltaT.primitiveField())
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<< ", " << gMax(1/rDeltaT.primitiveField()) << endl;
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}
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}
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// ************************************************************************* //
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