foam-extend4.1-coherent-io/applications/solvers/incompressible/pisoFoam/pisoFoam.C

/*---------------------------------------------------------------------------*\
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License
    This file is part of OpenFOAM.

    OpenFOAM is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
    Free Software Foundation; either version 2 of the License, or (at your
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Application
    pisoFoam

Description
    Transient solver for incompressible flow.

    Turbulence modelling is generic, i.e. laminar, RAS or LES may be selected.

\*---------------------------------------------------------------------------*/

#include "fvCFD.H"
#include "singlePhaseTransportModel.H"
#include "turbulenceModel.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

int main(int argc, char *argv[])
{
#   include "setRootCase.H"

#   include "createTime.H"
#   include "createMesh.H"
#   include "createFields.H"
#   include "initContinuityErrs.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

    Info<< "\nStarting time loop\n" << endl;

    while (runTime.loop())
    {
        Info<< "Time = " << runTime.timeName() << nl << endl;

#       include "readPISOControls.H"
#       include "CourantNo.H"

        // Pressure-velocity PISO corrector
        {
            // Momentum predictor

            fvVectorMatrix UEqn
            (
                fvm::ddt(U)
              + fvm::div(phi, U)
              + turbulence->divDevReff(U)
            );

            UEqn.relax();

            if (momentumPredictor)
            {
                solve(UEqn == -fvc::grad(p));
            }

            // --- PISO loop

            for (int corr=0; corr<nCorr; corr++)
            {
                volScalarField rUA = 1.0/UEqn.A();

                U = rUA*UEqn.H();
                phi = (fvc::interpolate(U) & mesh.Sf())
                    + fvc::ddtPhiCorr(rUA, U, phi);

                adjustPhi(phi, U, p);

                // Non-orthogonal pressure corrector loop
                for (int nonOrth=0; nonOrth<=nNonOrthCorr; nonOrth++)
                {
                    // Pressure corrector

                    fvScalarMatrix pEqn
                    (
                        fvm::laplacian(rUA, p) == fvc::div(phi)
                    );

                    pEqn.setReference(pRefCell, pRefValue);

                    if
                    (
                        corr == nCorr-1
                     && nonOrth == nNonOrthCorr
                    )
                    {
                        pEqn.solve(mesh.solutionDict().solver("pFinal"));
                    }
                    else
                    {
                        pEqn.solve();
                    }

                    if (nonOrth == nNonOrthCorr)
                    {
                        phi -= pEqn.flux();
                    }
                }

#               include "continuityErrs.H"

                U -= rUA*fvc::grad(p);
                U.correctBoundaryConditions();
            }
        }

        turbulence->correct();

        runTime.write();

        Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
            << "  ClockTime = " << runTime.elapsedClockTime() << " s"
            << nl << endl;
    }

    Info<< "End\n" << endl;

    return 0;
}


// ************************************************************************* //