[FPereira]

Hi,

I'm simulating the flow past a circular cylinder with LES, and in order to check its quality I'm writing the "instantaneous" velocity field at certain nodes (for each time step). To obtain the velocity fluctuations at these nodes I have to subtract the mean-flow velocity. However, due to the vortex shedding, the mean-flow is not constant. Can anyone tell me or give me some tips/references about the way to solve this issue. Is removing the mean-flow frequency with an fft a good/accurate approach?
Maybe the answer to this question is obvious but I'm new using LES.

Thank in advance

F.Pereira