The characteristic length of the SGS eddies is __________(a) half of the filter cut-off width(b) the filter cut-off width(c) twice the filter cut-off width(d) thrice the filter cut-off widthI got this question during an interview.Enquiry is from Turbulence Modelling topic in division Turbulence Modelling of Computational Fluid Dynamics

The characteristic length of the SGS eddies is __________(a) half of t

1.	The characteristic length of the SGS eddies is __________(a) half of the filter cut-off width(b) the filter cut-off width(c) twice the filter cut-off width(d) thrice the filter cut-off widthI got this question during an interview.Enquiry is from Turbulence Modelling topic in division Turbulence Modelling of Computational Fluid Dynamics
Answer» CORRECT answer is (B) the filter cut-off WIDTH For explanation: The LES filter ACCEPTS and rejects eddies based on the filter cut-off width. So, the size of the SGS eddies is determined by the filter cut-off width and the same is used as the characteristic LENGTH.

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