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Cylinder projected area (Cd)

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Old   July 8, 2016, 13:31
Question Cylinder projected area (Cd)
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Max Vorstadt
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Hi! I have a cylinder perpendicular to the flow and I was wondering which is the projected area (Aref) that should be written down at the forceCoeffs function file in order to compute the drag coefficient.

The function looks like this:

patches     ( Cylinder );
    rhoName     rhoInf;
    rhoInf      1;
    liftDir     (0 0 1);
    dragDir     (1 0 0);
    CofR        (0 0 0);
    pitchAxis   (0 1 0);
    magUInf     26;
    lRef        0.120;
    Aref        0.0288;
I thought the Aref was just considering as a rectangle projected in a perpendicular plane (Aref=height*base), but maybe I am wrong and therefore the results I am obtaining are wrong as well.

Thanks in advance!

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cylinder, drag coefficient, force coefficients, forcecoeffs

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