openfoam/tutorials/MRFSimpleFoam/MRFSimpleFoam/createFields.H

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

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

#   include "createPhi.H"


    label pRefCell = 0;
    scalar pRefValue = 0.0;
    setRefCell(p, mesh.solutionDict().subDict("SIMPLE"), pRefCell, pRefValue);


    singlePhaseTransportModel laminarTransport(U, phi);

    autoPtr<turbulenceModel> turbulence
    (
        turbulenceModel::New(U, phi, laminarTransport)
    );


    MRFZones mrfZones(mesh);
    mrfZones.correctBoundaryVelocity(U);