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fluent gets wrong airfoil vortex shedding frequency

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Old   July 19, 2012, 10:39
Exclamation fluent gets wrong airfoil vortex shedding frequency
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When i used fluent to simulation the airfoil far field sound, i find that the vortex shedding frequency is lower than the experment data, do anyone know what is wrong, and how to deal with it?
thank you!
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