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Old   December 27, 2005, 06:36
Default vortex shedding frequency
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Erdem
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Hi all,

I'am a fluent user and meanwhile doing validation cases on the 3D ahmed body. How can I find the vortex shedding frequency and related strouhal number by cfd. should I have to learn UDF for this reason or is there an easier way? thank a lot

Erdem
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Old   December 30, 2005, 19:31
Default Re: vortex shedding frequency
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Mike
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Take the FFT (located in the plot drop down menu) of the Cd history. The peak freq. should be twice the shedding frequency. Then plug 1/2 peak freq. into str.# formula. I've used this method for shedding from normal 2D flat plates and cylinders with success.
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