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Circular cylinder Strouhal number too high

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Old   January 20, 2017, 09:12
Default Circular cylinder Strouhal number too high
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Hi all,

I'm modelling a Re=30470 flow past a circular rigid cylinder with Spalart-Allamras URANS model, but when I analyze the FFT of CL, frequency of vortex shredding is too high. Hence my Strouhal number is 0.225, against 0.19-0.20 as expected from literature.
Why does it happen?

Thanks.
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circular cylinder, frequency, spalart allamras, strouhal number, vortex shredding

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