/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
     \\/     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 3 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, see <http://www.gnu.org/licenses/>.

Application
    rhoPimpleFoam

Group
    grpCompressibleSolvers grpMovingMeshSolvers

Description
    Transient solver for turbulent flow of compressible fluids for HVAC and
    similar applications, with optional mesh motion and mesh topology changes.

    Uses the flexible PIMPLE (PISO-SIMPLE) solution for time-resolved and
    pseudo-transient simulations.

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

#include "fvCFD.H"
#include "dynamicFvMesh.H"
#include "psiThermo.H"
#include "turbulentFluidThermoModel.H"
#include "bound.H"
#include "pimpleControl.H"
#include "CorrectPhi.H"
#include "fvOptions.H"
#include "localEulerDdtScheme.H"
#include "fvcSmooth.H"

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

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

    #include "setRootCase.H"
    #include "createTime.H"
    #include "createDynamicFvMesh.H"
    #include "createControl.H"
    #include "createRDeltaT.H"
    #include "initContinuityErrs.H"
    #include "createFields.H"
    #include "createFieldRefs.H"
    #include "createFvOptions.H"
    #include "createRhoUf.H"
    #include "createControls.H"

    turbulence->validate();

    if (!LTS)
    {
        #include "compressibleCourantNo.H"
        #include "setInitialDeltaT.H"
    }

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

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

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

        {
            // Store divrhoU from the previous mesh so that it can be mapped
            // and used in correctPhi to ensure the corrected phi has the
            // same divergence
            volScalarField divrhoU
            (
                "divrhoU",
                fvc::div(fvc::absolute(phi, rho, U))
            );

            if (LTS)
            {
                #include "setRDeltaT.H"
            }
            else
            {
                #include "compressibleCourantNo.H"
                #include "setDeltaT.H"
            }

            runTime++;

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

            // Store momentum to set rhoUf for introduced faces.
            volVectorField rhoU("rhoU", rho*U);

            // Do any mesh changes
            mesh.update();

            if (mesh.changing() && correctPhi)
            {
                // Calculate absolute flux from the mapped surface velocity
                phi = mesh.Sf() & rhoUf;

                #include "correctPhi.H"

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

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

        #include "rhoEqn.H"
        Info<< "rhoEqn max/min : " << max(rho).value()
            << " " << min(rho).value() << endl;

        // --- Pressure-velocity PIMPLE corrector loop
        while (pimple.loop())
        {
            #include "UEqn.H"
            #include "EEqn.H"

            // --- Pressure corrector loop
            while (pimple.correct())
            {
                #include "pEqn.H"
            }

            if (pimple.turbCorr())
            {
                turbulence->correct();
            }
        }

        runTime.write();

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

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

    return 0;
}


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