foam-extend4.1-coherent-io/applications/solvers/heatTransfer/buoyantPisoFoam/createFields.H

    Info<< "Reading thermophysical properties\n" << endl;

    autoPtr<basicRhoThermo> pThermo
    (
        basicRhoThermo::New(mesh)
    );
    basicRhoThermo& thermo = pThermo();

    volScalarField rho
    (
        IOobject
        (
            "rho",
            runTime.timeName(),
            mesh,
            IOobject::NO_READ,
            IOobject::NO_WRITE
        ),
        thermo.rho()
    );

    volScalarField& p = thermo.p();
    volScalarField& h = thermo.h();
    const volScalarField& psi = thermo.psi();


    Info<< "Reading field U\n" << endl;
    volVectorField U
    (
        IOobject
        (
            "U",
            runTime.timeName(),
            mesh,
            IOobject::MUST_READ,
            IOobject::AUTO_WRITE
        ),
        mesh
    );

    #include "compressibleCreatePhi.H"


    Info<< "Creating turbulence model\n" << endl;
    autoPtr<compressible::turbulenceModel> turbulence
    (
        compressible::turbulenceModel::New
        (
            rho,
            U,
            phi,
            thermo
        )
    );

    Info<< "Creating field DpDt\n" << endl;
    volScalarField DpDt
    (
        "DpDt",
        fvc::DDt(surfaceScalarField("phiU", phi/fvc::interpolate(rho)), p)
    );

    thermo.correct();

    dimensionedScalar initialMass = fvc::domainIntegrate(rho);

    dimensionedScalar totalVolume = sum(mesh.V());

    mesh.schemesDict().setFluxRequired(p.name());