pEqn.H

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{
    volScalarField rAU("rAU", 1.0/UEqn.A());
    surfaceScalarField rAUf("rAUf", fvc::interpolate(rAU));
    volVectorField HbyA(constrainHbyA(rAU*UEqn.H(), U, p_rgh));
    surfaceScalarField phiHbyA
    (
        "phiHbyA",
        fvc::flux(HbyA)
      + fvc::interpolate(rho*rAU)*fvc::ddtCorr(U, phi)
    );
 
    surfaceScalarField phig
    (
        (
            mixture.surfaceTensionForce()
          - ghf*fvc::snGrad(rho)
        )*rAUf*mesh.magSf()
    );
 
    phiHbyA += phig;
 
    // Update the pressure BCs to ensure flux consistency
    constrainPressure(p_rgh, U, phiHbyA, rAUf);
 
    PtrList<fvScalarMatrix> p_rghEqnComps(mixture.phases().size());
 
    label phasei = 0;
    forAllConstIters(mixture.phases(), phase)
    {
        const rhoThermo& thermo = phase().thermo();
        const tmp<volScalarField> trho(thermo.rho());
        const volScalarField& rho = trho();
 
        p_rghEqnComps.set
        (
            phasei,
            (
                fvc::ddt(rho) + thermo.psi()*correction(fvm::ddt(p_rgh))
              + fvc::div(phi, rho) - fvc::Sp(fvc::div(phi), rho)
            ).ptr()
        );
 
        ++phasei;
    }
 
    // Cache p_rgh prior to solve for density update
    volScalarField p_rgh_0(p_rgh);
 
    while (pimple.correctNonOrthogonal())
    {
        fvScalarMatrix p_rghEqnIncomp
        (
            fvc::div(phiHbyA)
          - fvm::laplacian(rAUf, p_rgh)
        );
 
        tmp<fvScalarMatrix> p_rghEqnComp;
 
        phasei = 0;
        forAllConstIters(mixture.phases(), phase)
        {
            tmp<fvScalarMatrix> hmm
            (
                (max(phase(), scalar(0))/phase().thermo().rho())
               *p_rghEqnComps[phasei]
            );
 
            if (phasei == 0)
            {
                p_rghEqnComp = hmm;
            }
            else
            {
                p_rghEqnComp.ref() += hmm;
            }
 
            ++phasei;
        }
 
        solve
        (
            p_rghEqnComp
          + p_rghEqnIncomp,
            p_rgh.select(pimple.finalInnerIter())
        );
 
        if (pimple.finalNonOrthogonalIter())
        {
            phasei = 0;
            for (phaseModel& phase : mixture.phases())
            {
                phase.dgdt() =
                    pos0(phase)
                  *(p_rghEqnComps[phasei] & p_rgh)/phase.thermo().rho();
 
                ++phasei;
            }
 
            phi = phiHbyA + p_rghEqnIncomp.flux();
 
            U = HbyA
              + rAU*fvc::reconstruct((phig + p_rghEqnIncomp.flux())/rAUf);
            U.correctBoundaryConditions();
        }
    }
 
    p = max(p_rgh + mixture.rho()*gh, pMin);
 
    // Update densities from change in p_rgh
    mixture.correctRho(p_rgh - p_rgh_0);
    rho = mixture.rho();
 
    // Correct p_rgh for consistency with p and the updated densities
    p_rgh = p - rho*gh;
    p_rgh.correctBoundaryConditions();
 
    K = 0.5*magSqr(U);
 
    Info<< "max(U) " << max(mag(U)).value() << endl;
    Info<< "min(p_rgh) " << min(p_rgh).value() << endl;
}