pEqn.H

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{
    volVectorField HbyA(constrainHbyA(rAUc*UEqn.H(), U, p_rgh));
 
    surfaceScalarField phiHbyA
    (
        "phiHbyA",
        fvc::flux(HbyA)
      + alphacf*fvc::interpolate(rho*rAUc)*fvc::ddtCorr(U, phi)
    );
 
    MRF.makeRelative(phiHbyA);
    adjustPhi(phiHbyA, U, p_rgh);
 
    surfaceScalarField phig
    (
        phicForces +
        (
            fvc::interpolate(mixture.sigmaK())*fvc::snGrad(alpha1)
          - ghf*fvc::snGrad(rho)
        )*rAUcf*mesh.magSf()
    );
 
    phiHbyA += phig;
 
    // Update the pressure BCs to ensure flux consistency
    constrainPressure(p_rgh, U, phiHbyA, rAUcf, MRF);
 
    while (pimple.correctNonOrthogonal())
    {
        surfaceScalarField Dp("Dp", alphacf*rAUcf);
 
        fvScalarMatrix p_rghEqn
        (
            fvm::laplacian(Dp, p_rgh)
         ==
            fvc::ddt(alphac) + fvc::div(alphacf*phiHbyA)
        );
 
        p_rghEqn.setReference(pRefCell, getRefCellValue(p_rgh, pRefCell));
 
        p_rghEqn.solve(mesh.solver(p_rgh.select(pimple.finalInnerIter())));
 
        if (pimple.finalNonOrthogonalIter())
        {
            phi = phiHbyA - p_rghEqn.flux()/alphacf;
 
            p_rgh.relax();
 
            U =
                HbyA
              + rAUc*fvc::reconstruct((phig - p_rghEqn.flux()/alphacf)/rAUcf);
 
            U.correctBoundaryConditions();
 
            fvOptions.correct(U);
        }
    }
 
    #include "continuityErrs.H"
 
    p == p_rgh + rho*gh;
 
    if (p_rgh.needReference())
    {
        p += dimensionedScalar
        (
            "p",
            p.dimensions(),
            pRefValue - getRefCellValue(p, pRefCell)
        );
        p_rgh = p - rho*gh;
    }
}