138 lines
3.9 KiB
C++
138 lines
3.9 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 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 "isothermalFilm.H"
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#include "surfaceTensionModel.H"
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#include "constrainHbyA.H"
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#include "fvcFlux.H"
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#include "fvcSnGrad.H"
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#include "fvcReconstruct.H"
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#include "fvmDiv.H"
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#include "fvmLaplacian.H"
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// * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
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void Foam::solvers::isothermalFilm::correctAlpha()
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{
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volScalarField& alpha = alpha_;
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volVectorField& U = U_;
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fvVectorMatrix& UEqn = tUEqn.ref();
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const surfaceScalarField rhof(fvc::interpolate(rho));
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const surfaceScalarField pbByAlphaf(this->pbByAlphaf());
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const surfaceScalarField pbByAlphaGradRhof
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(
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constrainedField(this->pbByAlphaGradRhof()*mesh.magSf())
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);
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const surfaceScalarField phip
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(
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constrainedField
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(
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fvc::snGrad(pe() + pc(surfaceTension->sigma()), "snGrad(p)")
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*mesh.magSf()
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- rhof*(g & mesh.Sf())
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)
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);
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while (pimple.correct())
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{
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const volScalarField rAU(1/UEqn.A());
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const volVectorField HbyA(constrainHbyA(rAU*UEqn.H(), U, alpha));
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const surfaceScalarField alphaf
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(
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constrainedField(max(fvc::interpolate(alpha), 0.0))
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);
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const surfaceScalarField alpharAUf
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(
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constrainedField(fvc::interpolate(alpha*rAU))
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);
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const surfaceScalarField phig("phig", phip + pbByAlphaGradRhof*alphaf);
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phi = constrainPhiHbyA(fvc::flux(HbyA) - alpharAUf*phig, U, alpha);
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const surfaceScalarField phid("phid", rhof*phi);
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const surfaceScalarField rAUf
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(
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"rAUf",
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alphaf*rhof*alpharAUf*pbByAlphaf
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);
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fvScalarMatrix alphadEqn
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(
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fvm::ddt(rho, alpha)
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+ fvm::div(phid, alpha)
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==
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fvModels().source(rho, alpha)
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);
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while (pimple.correctNonOrthogonal())
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{
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fvScalarMatrix alphaEqn(alphadEqn - fvm::laplacian(rAUf, alpha));
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alphaEqn.solve();
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if (pimple.finalNonOrthogonalIter())
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{
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alphaRhoPhi = alphaEqn.flux();
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}
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}
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const surfaceScalarField phiGradAlpha
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(
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constrainedField(pbByAlphaf*fvc::snGrad(alpha)*mesh.magSf())
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);
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phi -= alpharAUf*phiGradAlpha;
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U = HbyA - rAU*fvc::reconstruct(alphaf*(phig + phiGradAlpha));
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// Remove film-normal component of velocity
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U -= nHat*(nHat & U);
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U.correctBoundaryConditions();
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fvConstraints().constrain(U);
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fvConstraints().constrain(alpha);
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continuityErrors();
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}
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// Update film thickness
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correctDelta();
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tUEqn.clear();
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}
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// ************************************************************************* //
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