/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright held by original author
     \\/     M anipulation  |
-------------------------------------------------------------------------------
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
    option) any later version.

    OpenFOAM 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 General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM; if not, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Application
    pimpleDyMFoam.C

Description
    Transient solver for incompressible, flow of Newtonian fluids
    on a moving mesh using the PIMPLE (merged PISO-SIMPLE) algorithm.

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

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

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

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

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

#   include "createTime.H"
#   include "createDynamicFvMesh.H"
#   include "readPIMPLEControls.H"
#   include "initContinuityErrs.H"
#   include "createFields.H"
#   include "readTimeControls.H"

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

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

    while (runTime.run())
    {
#       include "readControls.H"

        // Make the fluxes absolute
        fvc::makeAbsolute(phi, U);

#       include "CourantNo.H"
#       include "setDeltaT.H"

        runTime++;

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

        bool meshChanged = mesh.update();

        if (correctPhi && (mesh.moving() || meshChanged))
        {
#           include "correctPhi.H"
        }

        // Make the fluxes relative to the mesh motion
        fvc::makeRelative(phi, U);

        if (mesh.moving() && checkMeshCourantNo)
        {
#           include "meshCourantNo.H"
        }

        // --- PIMPLE loop
        for (int ocorr=0; ocorr<nOuterCorr; ocorr++)
        {
            if (nOuterCorr != 1)
            {
                p.storePrevIter();
            }

#           include "UEqn.H"

            // --- PISO loop
            for (int corr=0; corr<nCorr; corr++)
            {
                rAU = 1.0/UEqn.A();

                U = rAU*UEqn.H();
                phi = (fvc::interpolate(U) & mesh.Sf());

                if (p.needReference())
                {
                    fvc::makeRelative(phi, U);
                    adjustPhi(phi, U, p);
                    fvc::makeAbsolute(phi, U);
                }

                for (int nonOrth=0; nonOrth<=nNonOrthCorr; nonOrth++)
                {
                    fvScalarMatrix pEqn
                    (
                        fvm::laplacian(rAU, p) == fvc::div(phi)
                    );

                    pEqn.setReference(pRefCell, pRefValue);

                    if
                    (
                        ocorr == nOuterCorr - 1
                     && corr == nCorr - 1
                     && nonOrth == nNonOrthCorr
                    )
                    {
                        pEqn.solve
                        (
                            mesh.solutionDict().solver(p.name() + "Final")
                        );
                    }
                    else
                    {
                        pEqn.solve(mesh.solutionDict().solver(p.name()));
                    }

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

#               include "continuityErrs.H"

                // Explicitly relax pressure for momentum corrector
                if (ocorr != nOuterCorr - 1)
                {
                    p.relax();
                }

                // Make the fluxes relative to the mesh motion
                fvc::makeRelative(phi, U);

                U -= rAU*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;
}


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