pressureCorrector.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | Copyright (C) 2023 OpenFOAM Foundation
     \\/     M anipulation  |
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License
    This file is part of OpenFOAM.
 
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#include "twoPhaseSolver.H"
#include "constrainHbyA.H"
#include "constrainPressure.H"
#include "adjustPhi.H"
#include "findRefCell.H"
#include "fvcMeshPhi.H"
#include "fvcFlux.H"
#include "fvcDdt.H"
#include "fvcDiv.H"
#include "fvcSnGrad.H"
#include "fvcReconstruct.H"
#include "fvmLaplacian.H"
 
// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
void Foam::solvers::twoPhaseSolver::incompressiblePressureCorrector
(
    volScalarField& p
)
{
    volVectorField& U = U_;
    surfaceScalarField& phi(phi_);
 
    fvVectorMatrix& UEqn = tUEqn.ref();
    setrAU(UEqn);
 
    const surfaceScalarField rAUf("rAUf", fvc::interpolate(rAU()));
 
    while (pimple.correct())
    {
        volVectorField HbyA(constrainHbyA(rAU()*UEqn.H(), U, p_rgh));
        surfaceScalarField phiHbyA
        (
            "phiHbyA",
            fvc::flux(HbyA)
          + fvc::interpolate(rho*rAU())*fvc::ddtCorr(U, phi, Uf)
        );
 
        MRF.makeRelative(phiHbyA);
 
        if (p_rgh.needReference())
        {
            fvc::makeRelative(phiHbyA, U);
            adjustPhi(phiHbyA, U, p_rgh);
            fvc::makeAbsolute(phiHbyA, U);
        }
 
        surfaceScalarField phig
        (
            (
                surfaceTensionForce()
              - buoyancy.ghf*fvc::snGrad(rho)
            )*rAUf*mesh.magSf()
        );
 
        phiHbyA += phig;
 
        // Update the pressure BCs to ensure flux consistency
        constrainPressure(p_rgh, U, phiHbyA, rAUf, MRF);
 
        // Cache any sources
        fvScalarMatrix p_rghEqnSource
        (
            fvModels().sourceProxy(alpha1, p_rgh)
          + fvModels().sourceProxy(alpha2, p_rgh)
        );
 
        while (pimple.correctNonOrthogonal())
        {
            fvScalarMatrix p_rghEqn
            (
                fvc::div(phiHbyA) - fvm::laplacian(rAUf, p_rgh)
             == p_rghEqnSource
            );
 
            p_rghEqn.setReference
            (
                pressureReference().refCell(),
                getRefCellValue(p_rgh, pressureReference().refCell())
            );
 
            p_rghEqn.solve();
 
            if (pimple.finalNonOrthogonalIter())
            {
                phi = phiHbyA + p_rghEqn.flux();
 
                p_rgh.relax();
 
                U = HbyA
                  + rAU()*fvc::reconstruct((phig + p_rghEqn.flux())/rAUf);
                U.correctBoundaryConditions();
                fvConstraints().constrain(U);
            }
        }
 
        continuityErrors();
 
        // Correct Uf if the mesh is moving
        fvc::correctUf(Uf, U, phi, MRF);
 
        // Make the fluxes relative to the mesh motion
        fvc::makeRelative(phi, U);
 
        p == p_rgh + rho*buoyancy.gh;
 
        if (p_rgh.needReference())
        {
            p += dimensionedScalar
            (
                "p",
                p.dimensions(),
                pressureReference().refValue()
              - getRefCellValue(p, pressureReference().refCell())
            );
            p_rgh = p - rho*buoyancy.gh;
        }
    }
 
    clearrAU();
    tUEqn.clear();
}
 
 
// ************************************************************************* //