174 lines
5.3 KiB
C++
174 lines
5.3 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 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 "compressibleMultiphaseVoF.H"
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#include "constrainHbyA.H"
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#include "constrainPressure.H"
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#include "adjustPhi.H"
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#include "findRefCell.H"
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#include "fvcMeshPhi.H"
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#include "fvcFlux.H"
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#include "fvcDdt.H"
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#include "fvcDiv.H"
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#include "fvcSnGrad.H"
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#include "fvcSup.H"
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#include "fvcReconstruct.H"
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#include "fvmLaplacian.H"
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// * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
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void Foam::solvers::compressibleMultiphaseVoF::pressureCorrector()
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{
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volVectorField& U = U_;
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fvVectorMatrix& UEqn = tUEqn.ref();
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setrAU(UEqn);
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const surfaceScalarField rAUf("rAUf", fvc::interpolate(rAU()));
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while (pimple.correct())
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{
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const volVectorField HbyA(constrainHbyA(rAU()*UEqn.H(), U, p_rgh));
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surfaceScalarField phiHbyA
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(
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"phiHbyA",
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fvc::flux(HbyA)
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+ fvc::interpolate(rho*rAU())*fvc::ddtCorr(U, phi, Uf)
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);
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MRF.makeRelative(phiHbyA);
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const surfaceScalarField phig
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(
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(
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mixture.surfaceTensionForce(U)
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- buoyancy.ghf*fvc::snGrad(rho)
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)*rAUf*mesh.magSf()
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);
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phiHbyA += phig;
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// Update the pressure BCs to ensure flux consistency
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constrainPressure(p_rgh, U, phiHbyA, rAUf, MRF);
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PtrList<fvScalarMatrix> p_rghEqnComps(phases.size());
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forAll(phases, phasei)
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{
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const compressibleVoFphase& phase = phases[phasei];
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const rhoThermo& thermo = phase.thermo();
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const volScalarField& rho = thermo.rho()();
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p_rghEqnComps.set
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(
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phasei,
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(
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fvc::ddt(rho) + thermo.psi()*correction(fvm::ddt(p_rgh))
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+ fvc::div(phi, rho) - fvc::Sp(fvc::div(phi), rho)
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- (fvModels().source(phase, rho)&rho)
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).ptr()
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);
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}
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// Cache p_rgh prior to solve for density update
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const volScalarField p_rgh_0(p_rgh);
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while (pimple.correctNonOrthogonal())
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{
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fvScalarMatrix p_rghEqnIncomp
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(
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fvc::div(phiHbyA)
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- fvm::laplacian(rAUf, p_rgh)
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);
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tmp<fvScalarMatrix> p_rghEqnComp;
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forAll(phases, phasei)
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{
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const compressibleVoFphase& phase = phases[phasei];
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tmp<fvScalarMatrix> p_rghEqnCompi
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(
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(max(phase, scalar(0))/phase.thermo().rho())
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*p_rghEqnComps[phasei]
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);
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if (phasei == 0)
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{
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p_rghEqnComp = p_rghEqnCompi;
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}
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else
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{
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p_rghEqnComp.ref() += p_rghEqnCompi;
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}
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}
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solve(p_rghEqnComp + p_rghEqnIncomp);
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if (pimple.finalNonOrthogonalIter())
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{
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forAll(phases, phasei)
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{
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compressibleVoFphase& phase = phases[phasei];
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phase.dgdt() =
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pos0(phase)
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*(p_rghEqnComps[phasei] & p_rgh)/phase.thermo().rho();
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}
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phi = phiHbyA + p_rghEqnIncomp.flux();
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p = max(p_rgh + mixture.rho()*buoyancy.gh, pMin);
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p_rgh = p - rho*buoyancy.gh;
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p_rgh.correctBoundaryConditions();
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U = HbyA
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+ rAU()*fvc::reconstruct((phig + p_rghEqnIncomp.flux())/rAUf);
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U.correctBoundaryConditions();
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fvConstraints().constrain(U);
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}
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}
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// Correct Uf if the mesh is moving
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fvc::correctUf(Uf, U, fvc::absolute(phi, U), MRF);
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// Update densities from change in p_rgh
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mixture.correctRho(p_rgh - p_rgh_0);
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mixture.correct();
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// Correct p_rgh for consistency with p and the updated densities
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p_rgh = p - rho*buoyancy.gh;
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p_rgh.correctBoundaryConditions();
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}
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K = 0.5*magSqr(U);
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clearrAU();
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tUEqn.clear();
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}
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// ************************************************************************* //
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