pEqn.H

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{
    const volScalarField& psi = thermo.psi();
 
    tmp<volVectorField> tHbyA;
    if (pressureImplicitPorosity)
    {
        tHbyA = constrainHbyA(trTU()&UEqn.H(), U, p);
    }
    else
    {
        tHbyA = constrainHbyA(trAU()*UEqn.H(), U, p);
    }
    volVectorField& HbyA = tHbyA.ref();
 
    tUEqn.clear();
 
    bool closedVolume = false;
 
    surfaceScalarField phiHbyA("phiHbyA", fvc::flux(rho*HbyA));
    MRF.makeRelative(fvc::interpolate(rho), phiHbyA);
 
    closedVolume = adjustPhi(phiHbyA, U, p);
 
    while (simple.correctNonOrthogonal())
    {
        tmp<fvScalarMatrix> tpEqn;
 
        if (pressureImplicitPorosity)
        {
            tpEqn =
            (
                fvm::laplacian(rho*trTU(), p)
              + fvOptions(psi, p, rho.name())
             ==
                fvc::div(phiHbyA)
            );
        }
        else
        {
            tpEqn =
            (
                fvm::laplacian(rho*trAU(), p)
              + fvOptions(psi, p, rho.name())
             ==
                fvc::div(phiHbyA)
            );
        }
 
        fvScalarMatrix& pEqn = tpEqn.ref();
 
        pEqn.setReference
        (
            pressureControl.refCell(),
            pressureControl.refValue()
        );
 
        pEqn.solve();
 
        if (simple.finalNonOrthogonalIter())
        {
            phi = phiHbyA - pEqn.flux();
        }
    }
 
    #include "incompressible/continuityErrs.H"
 
    // Explicitly relax pressure for momentum corrector
    p.relax();
 
    if (pressureImplicitPorosity)
    {
        U = HbyA - (trTU() & fvc::grad(p));
    }
    else
    {
        U = HbyA - trAU()*fvc::grad(p);
    }
 
    U.correctBoundaryConditions();
    fvOptions.correct(U);
 
    pressureControl.limit(p);
 
    // For closed-volume cases adjust the pressure and density levels
    // to obey overall mass continuity
    if (closedVolume)
    {
        p += (initialMass - fvc::domainIntegrate(psi*p))
            /fvc::domainIntegrate(psi);
    }
 
    rho = thermo.rho();
    rho.relax();
}