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Strouhal number and multiple freq

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Old   January 11, 2012, 16:01
Default Strouhal number and multiple freq
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Daniel WEI (老魏)
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I have a question,

As I calculating the flow around a square cylinder, there are inevitably multi-frequencies.

So how did you guys calculate the Strouhal number then?

I saw the definition of St as against vortex shedding frequency, but in a relatively high Re, there will be more than one vortex shedding frequency, how to judge which is the biggest, if there are two biggest...

Will you do the average?
Daniel WEI
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