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udf about rotation-axis

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Old   June 22, 2016, 08:32
Default udf about rotation-axis
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Hong
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hi every one!

I am trying to use udf in fluent to simulate NACA0012 airfoil with this dynamic equation:


I am just a beginner of the udf, and I think I can simulate this case by DEFINE_CG_MOTION. But how to change the rotation aixs or define it? The omega[] means rotation by x/y/z axis, right? I think I need to give the axis a Uy to describe the motion. So who can tell me how to define my axis rather than xyz axis?
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