foam-extend4.1-coherent-io/tutorials/basic/scalarTransportFoam/swirlTest/setSwirl/setSwirl.C

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

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    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.

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Description
    Set up the velocity field

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

#include "fvCFD.H"

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

int main(int argc, char *argv[])
{

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

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

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

    // Do cells
    const volVectorField& centres = mesh.C();

    point origin(1, 1, 0.05);
    vector axis(0, 0, -1);

    U.internalField() = axis ^ (centres.internalField() - origin);

    U.boundaryField()[0] == (axis ^ (centres.boundaryField()[0] - origin));
    U.boundaryField()[1] == (axis ^ (centres.boundaryField()[1] - origin));
    U.boundaryField()[2] == (axis ^ (centres.boundaryField()[2] - origin));

    U.write();

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

    return(0);
}


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