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Wavenumber in L.E.S.

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Old   August 11, 2011, 20:39
Default Wavenumber in L.E.S.
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Derwin Parkin
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Hi guys,

I am trying to analyse the SGS of my L.E.S.. I want to plot Energy versus wavenumber, to see at what eddy size the modelling kicks in.

I can't exactly figure out the best way to do this in CFX - unfortunately I haven't seen wavenumber ever mentioned in the L.E.S. section of the Ansys documentation.

Does it involve taking the FFT of velocity at a single point? And should I be plotting against turbulent kinetic energy?

Any help would be greatly appreciated.

Thanks
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