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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2023-2026 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM 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.
OpenFOAM 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 OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
\*---------------------------------------------------------------------------*/
#include "twoPhaseVoFSolver.H"
#include "fvcSmooth.H"
#include "fviSurfaceIntegrate.H"
#include "fvcAverage.H"
// * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
void Foam::solvers::twoPhaseVoFSolver::setInterfaceRDeltaT
(
volScalarField& rDeltaT
)
{
const dictionary& pimpleDict = pimple.dict();
const scalar maxCo
(
pimpleDict.lookupOrDefault<scalar>("maxCo", 0.9)
);
const scalar maxAlphaCo
(
pimpleDict.lookupOrDefault<scalar>("maxAlphaCo", 0.2)
);
const scalar rDeltaTSmoothingCoeff
(
pimpleDict.lookupOrDefault<scalar>("rDeltaTSmoothingCoeff", 0.1)
);
const label nAlphaSpreadIter
(
pimpleDict.lookupOrDefault<label>("nAlphaSpreadIter", 1)
);
const scalar alphaSpreadDiff
(
pimpleDict.lookupOrDefault<scalar>("alphaSpreadDiff", 0.2)
);
const scalar alphaSpreadMax
(
pimpleDict.lookupOrDefault<scalar>("alphaSpreadMax", 0.99)
);
const scalar alphaSpreadMin
(
pimpleDict.lookupOrDefault<scalar>("alphaSpreadMin", 0.01)
);
const label nAlphaSweepIter
(
pimpleDict.lookupOrDefault<label>("nAlphaSweepIter", 5)
);
if (maxAlphaCo < maxCo)
{
// Further limit the reciprocal time-step
// in the vicinity of the interface
volScalarField alpha1Bar(fvc::average(alpha1));
rDeltaT.internalFieldRef() =
max
(
rDeltaT(),
pos0(alpha1Bar() - alphaSpreadMin)
*pos0(alphaSpreadMax - alpha1Bar())
*fvi::surfaceSum(mag(phi))/((2*maxAlphaCo)*mesh.V())
);
}
// Update the boundary values of the reciprocal time-step
rDeltaT.correctBoundaryConditions();
Info<< "Flow and interface time scale min/max = "
<< gMin(1/rDeltaT.primitiveField())
<< ", " << gMax(1/rDeltaT.primitiveField()) << endl;
if (rDeltaTSmoothingCoeff < 1.0)
{
fvc::smooth(rDeltaT, rDeltaTSmoothingCoeff);
}
if (nAlphaSpreadIter > 0)
{
fvc::spread
(
rDeltaT,
alpha1,
nAlphaSpreadIter,
alphaSpreadDiff,
alphaSpreadMax,
alphaSpreadMin
);
}
if (nAlphaSweepIter > 0)
{
fvc::sweep(rDeltaT, alpha1, nAlphaSweepIter, alphaSpreadDiff);
}
Info<< "Smoothed flow time scale min/max = "
<< gMin(1/rDeltaT.primitiveField())
<< ", " << gMax(1/rDeltaT.primitiveField()) << endl;
}
// ************************************************************************* //
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