/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     |
    \\  /    A nd           | For copyright notice see file Copyright
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of foam-extend.

    foam-extend 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.

    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.

Description
    COnvert volumetric to mass flux

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

#include "argList.H"
#include "fvCFD.H"

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

int main(int argc, char *argv[])
{
    argList::validOptions.insert("rhoRef", "scalar");

#   include "setRootCase.H"

    if (!args.options().found("rhoRef"))
    {
        FatalErrorIn(args.executable())
            << "Missing reference density"
            << endl;

        FatalError.exit();
    }


    dimensionedScalar rhoRef
    (
        "rhoRef",
        dimDensity,
        readScalar(IStringStream(args.options()["rhoRef"])())
    );

    Info<< "Reference density = " << rhoRef.value() << endl;


#   include "createTime.H"
#   include "createMesh.H"

    Info<< "Time = " << runTime.value() << endl;

    Info<< "    Reading p" << endl;
    volScalarField p
    (
        IOobject
        (
            "p",
            runTime.timeName(),
            mesh,
            IOobject::MUST_READ,
            IOobject::NO_WRITE
        ),
        mesh
    );

    if (p.dimensions() == dimPressure)
    {
        Info<< "Pressure " << p.name() << " is a dynamic pressure.  "
            << "Nothing to do"
            << endl;
    }
    else if (p.dimensions() == dimPressure/dimDensity)
    {
        volScalarField rhoP
        (
            IOobject
            (
                "rho" + p.name(),
                runTime.timeName(),
                mesh,
                IOobject::NO_READ,
                IOobject::NO_WRITE
            ),
            rhoRef*p
        );

        Info<< "Correcting kinematic pressure " << p.name()
            << " into dynamic pressure " << rhoP.name()
            << endl;

        rhoP.write();
    }
    else
    {
        Info<< "Cannot recognise dimensions of pressure field " << p.name()
            << ": " << p.dimensions() << ".  Ignoring" << endl;

    }

    Info<< "    Reading phi" << endl;
    surfaceScalarField phi
    (
        IOobject
        (
            "phi",
            runTime.timeName(),
            mesh,
            IOobject::MUST_READ,
            IOobject::NO_WRITE
        ),
        mesh
    );

    if (phi.dimensions() == dimMass/dimTime)
    {
        Info<< "Flux " << phi.name() << " is a mass flux.  Nothing to do"
            << endl;
    }
    else if (phi.dimensions() == dimVolume/dimTime)
    {
        surfaceScalarField rhoPhi
        (
            IOobject
            (
                "rho" + phi.name(),
                runTime.timeName(),
                mesh,
                IOobject::NO_READ,
                IOobject::NO_WRITE
            ),
            rhoRef*phi
        );

        Info<< "Correcting volume flux " << phi.name()
            << " into mass flux " << rhoPhi.name()
            << endl;

        rhoPhi.write();
    }
    else
    {
        Info<< "Cannot recognise dimensions of flux field " << phi.name()
            << ": " << phi.dimensions() << ".  Ignoring" << endl;
    }

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

    return(0);
}


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