correctPressure.C

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     \\/     M anipulation  |
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License
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#include "incompressibleFluid.H"
#include "constrainHbyA.H"
#include "constrainPressure.H"
#include "adjustPhi.H"
#include "fvcMeshPhi.H"
#include "fvcFlux.H"
#include "fvcDdt.H"
#include "fvcGrad.H"
#include "fvcSnGrad.H"
#include "fvmLaplacian.H"
 
// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
void Foam::solvers::incompressibleFluid::correctPressure()
{
    volScalarField& p(p_);
    volVectorField& U(U_);
    surfaceScalarField& phi(phi_);
 
    fvVectorMatrix& UEqn = tUEqn.ref();
 
    volScalarField rAU(1.0/UEqn.A());
    volVectorField HbyA(constrainHbyA(rAU*UEqn.H(), U, p));
    surfaceScalarField phiHbyA
    (
        "phiHbyA",
        fvc::flux(HbyA)
      + fvc::interpolate(rAU)*fvc::ddtCorr(U, phi, Uf)
    );
 
    MRF.makeRelative(phiHbyA);
 
    if (p.needReference())
    {
        fvc::makeRelative(phiHbyA, U);
        adjustPhi(phiHbyA, U, p);
        fvc::makeAbsolute(phiHbyA, U);
    }
 
    tmp<volScalarField> rAtU(rAU);
 
    if (pimple.consistent())
    {
        rAtU = 1.0/max(1.0/rAU - UEqn.H1(), 0.1/rAU);
        phiHbyA +=
            fvc::interpolate(rAtU() - rAU)*fvc::snGrad(p)*mesh.magSf();
        HbyA -= (rAU - rAtU())*fvc::grad(p);
    }
 
    if (pimple.nCorrPiso() <= 1)
    {
        tUEqn.clear();
    }
 
    // Update the pressure BCs to ensure flux consistency
    constrainPressure(p, U, phiHbyA, rAtU(), MRF);
 
    // Evaluate any volume sources
    fvScalarMatrix p_rghEqnSource(fvModels().sourceProxy(p));
 
    // Non-orthogonal pressure corrector loop
    while (pimple.correctNonOrthogonal())
    {
        fvScalarMatrix pEqn
        (
            fvm::laplacian(rAtU(), p)
         ==
            fvc::div(phiHbyA)
          - p_rghEqnSource
        );
 
        pEqn.setReference
        (
            pressureReference.refCell(),
            pressureReference.refValue()
        );
 
        pEqn.solve();
 
        if (pimple.finalNonOrthogonalIter())
        {
            phi = phiHbyA - pEqn.flux();
        }
    }
 
    continuityErrors();
 
    // Explicitly relax pressure for momentum corrector
    p.relax();
 
    U = HbyA - rAtU*fvc::grad(p);
    U.correctBoundaryConditions();
    fvConstraints().constrain(U);
 
    // 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);
}
 
 
// ************************************************************************* //