pEqn.H

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{
    volScalarField rAU("rAU", 1.0/UEqn.A());
    surfaceScalarField rAUf("rAUf", fvc::interpolate(rAU));
 
    volVectorField HbyA("HbyA", U);
    HbyA = rAU*UEqn.H();
 
    surfaceScalarField phiHbyA
    (
        "phiHbyA",
        (fvc::interpolate(HbyA) & mesh.Sf())
      + fvc::interpolate(rho*rAU)*fvc::ddtCorr(U, phi)
    );
    adjustPhi(phiHbyA, U, p_rgh);
 
    surfaceScalarField phig
    (
        (
            fluid.surfaceTensionForce()
          - ghf*fvc::snGrad(rho)
        )*rAUf*mesh.magSf()
    );
 
    phiHbyA += phig;
 
    // Update the fixedFluxPressure BCs to ensure flux consistency
    constrainPressure(p_rgh, U, phiHbyA, rAUf);
 
    while (pimple.correctNonOrthogonal())
    {
 
        fvScalarMatrix p_rghEqn
        (
            fvc::div(phiHbyA)
          - fvm::laplacian(rAUf, p_rgh)
        );
 
        if (fluid.includeVolChange())
        {
            p_rghEqn += fluid.volTransfer(p_rgh);
        }
 
        p_rghEqn.setReference(pRefCell, pRefValue);
 
        p_rghEqn.solve(mesh.solver(p_rgh.select(pimple.finalInnerIter())));
 
        if (pimple.finalNonOrthogonalIter())
        {
            phi = phiHbyA + p_rghEqn.flux();
 
            p_rgh.relax();
 
            U = HbyA + rAU*fvc::reconstruct((phig + p_rghEqn.flux())/rAUf);
 
            U.correctBoundaryConditions();
            fvOptions.correct(U);
            K = 0.5*magSqr(U);
        }
    }
 
    p == p_rgh + rho*gh;
 
    if (p_rgh.needReference())
    {
        p += dimensionedScalar
        (
            "p",
            p.dimensions(),
            pRefValue - getRefCellValue(p, pRefCell)
        );
        p_rgh = p - rho*gh;
    }
}