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how to set functions about Cd and Cl

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Old   July 1, 2013, 05:42
Default how to set functions about Cd and Cl
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JM
Join Date: Jul 2013
Posts: 7
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Hello everyone
I am simulating flow past a square cylinder problem.I have attached the model here.The flow is along z axis.The square cylinder axis is parallel to the y-axis.The width and the height of the square cylinder is 0.1 and 0.3.
I have tried to set the file accorrding http://openfoamwiki.net/index.php/Be...coftac_ufr2-02but the result looks not good.

Code:
functions
{
    

    forces
    {
        type        forceCoeffs;
        functionObjectLibs ( "libforces.so" );
        outputControl timeStep;
        outputInterval 1;
        patches
        (
            INWALL
        );
		directForceDensity no;

        pName       p;
        UName       U;
        rhoName     rhoInf;
        //log         true;
        rhoInf      1;
        CofR        ( 0 0 0 );
        liftDir     ( 1 0 0 );    //x direction
        dragDir     ( 0 0 1 );    //z direction
        pitchAxis   ( 0 0 0 );
        magUInf     2;         //z direction
        lRef        0.1;
        Aref        0.03;    //
        Aref1        0.01;   //?
        rhoRef      1;
    }

   
}
I am not sure about the red lines.

Thank you very much!

regards


JM
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Last edited by xiaof; July 1, 2013 at 23:52.
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