Abstract
We present a study of the preferential concentration and clustering in homogeneous and isotropic turbulence. Using Voronoï diagrams, we have formerly quantified preferential concentration as a function of the Stokes number in moderate turbulence conditions up to Reynolds number based on Taylor microscale of the order of Rλ ∼ 120. Using an active grid recently implemented in our windtunnel, we investigate in the present study, the effect of Reynolds number on particles clustering, in the range Rλ ∼ 200 – 400.
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