Hello All

I am doing LES of flow around circular cylinder at Re ~ 30000. My aim is to obtain coherence function from surface pressure fluctuations

along the span wise length of cylinder. It is expected that at vortex shedding frequency, coherence is =1 and at other frequencies, coherence value

reduces rapidly to low values. Unfortunately I am not able to get this behaviour from the monitored surface pressure fluctuations. At vortex shedding frequency, cohrence =1; but other

frequencies, it is not reducing rapdly. Can anybody came across this before. Any help is highly appreciated.

1. I am using Ansys Fluent for flow field simulation.

2. Points to monitor pressure are defined very close to the cylinder surface (y+