109 lines
3.3 KiB
C++
109 lines
3.3 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) 2023-2024 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 "multiphaseVoFSolver.H"
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#include "fvcSmooth.H"
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#include "fvcSurfaceIntegrate.H"
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#include "fvcAverage.H"
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// * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
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void Foam::solvers::multiphaseVoFSolver::setInterfaceRDeltaT
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(
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volScalarField& rDeltaT
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)
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{
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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 maxAlphaCo
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(
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pimpleDict.lookupOrDefault<scalar>("maxAlphaCo", 0.2)
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);
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const scalar rDeltaTSmoothingCoeff
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(
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pimpleDict.lookupOrDefault<scalar>("rDeltaTSmoothingCoeff", 0.1)
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);
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const scalar alphaSpreadMax
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(
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pimpleDict.lookupOrDefault<scalar>("alphaSpreadMax", 0.99)
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);
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const scalar alphaSpreadMin
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(
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pimpleDict.lookupOrDefault<scalar>("alphaSpreadMin", 0.01)
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);
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if (maxAlphaCo < maxCo)
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{
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// Further limit the reciprocal time-step
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// in the vicinity of the interface
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const volScalarField::Internal alphaCoRdeltaT
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(
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fvc::surfaceSum(mag(phi))()()/((2*maxAlphaCo)*mesh.V())
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);
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forAll(phases, phasei)
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{
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const volScalarField alphaBar(fvc::average(phases[phasei]));
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rDeltaT.internalFieldRef() =
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max
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(
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rDeltaT(),
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pos0(alphaBar() - alphaSpreadMin)
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*pos0(alphaSpreadMax - alphaBar())
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*alphaCoRdeltaT
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);
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}
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}
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// Update the boundary values of the reciprocal time-step
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rDeltaT.correctBoundaryConditions();
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Info<< "Flow and interface 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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if (rDeltaTSmoothingCoeff < 1.0)
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{
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fvc::smooth(rDeltaT, rDeltaTSmoothingCoeff);
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}
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Info<< "Smoothed 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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