pEqn.H

/*---------------------------------------------------------------------------*\
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 * In real Time Highly Advanced Computational Applications for Finite Volumes
 * Copyright (C) 2017 by the ITHACA-FV authors
-------------------------------------------------------------------------------
  License
  This file is part of ITHACA-FV
  ITHACA-FV is free software: you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  ITHACA-FV is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  GNU Lesser General Public License for more details.
  You should have received a copy of the GNU Lesser General Public License
  along with ITHACA-FV. If not, see <http://www.gnu.org/licenses/>.
\*---------------------------------------------------------------------------*/
 
{
    volScalarField rAU("rAU", 1.0 / UEqn.A());
    surfaceScalarField rAUf("rAUf", fvc::interpolate(rAU));
    volVectorField HbyA(constrainHbyA(rAU * UEqn.H(), U, p_rgh));
 
    surfaceScalarField phig(-rAUf* ghf * fvc::snGrad(rhok) * mesh.magSf());
 
    surfaceScalarField phiHbyA
    (
        "phiHbyA",
        fvc::flux(HbyA)
        + rAUf * fvc::ddtCorr(U, phi)
        + phig
    );
 
    MRF.makeRelative(phiHbyA);
 
    // Update the pressure BCs to ensure flux consistency
    constrainPressure(p_rgh, U, phiHbyA, rAUf, MRF);
 
    while (pimple.correctNonOrthogonal())
    {
        fvScalarMatrix p_rghEqn
        (
            fvm::laplacian(rAUf, p_rgh) == fvc::div(phiHbyA)
        );
        p_rghEqn.setReference(pRefCell, getRefCellValue(p_rgh, pRefCell));
        p_rghEqn.solve(mesh.solver(p_rgh.select(pimple.finalInnerIter())));
 
        if (pimple.finalNonOrthogonalIter())
        {
            // Calculate the conservative fluxes
            phi = phiHbyA - p_rghEqn.flux();
            // Explicitly relax pressure for momentum corrector
            p_rgh.relax();
            // Correct the momentum source with the pressure gradient flux calculated from the relaxed pressure
            U = HbyA + rAU * fvc::reconstruct((phig - p_rghEqn.flux()) / rAUf);
            U.correctBoundaryConditions();
            fvOptions.correct(U);
        }
    }
 
#include "continuityErrs.H"
 
    p = p_rgh + rhok * gh;
 
 
    if (p_rgh.needReference())
    {
        p += dimensionedScalar
             (
                 "p",
                 p.dimensions(),
                 pRefValue - getRefCellValue(p, pRefCell)
             );
        p_rgh = p - rhok * gh;
    }
}