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Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2012

On the clustering of finite size particles in turbulence

Résumé

We investigate experimentally the spatial distributions of heavy and neutrally buoyant particles of finite size in a fully turbulent flow. Because their Stokes number (i.e., the ratio of the particle viscous relaxation time to a typical flow time scale) is close to unity, one may expect both classes of particles to aggregate in specific flow regions. This is not observed. Using a Voronoï analysis we show that neutrally buoyant particles sample turbulence homogeneously, whereas heavy particles do cluster. These results show that several dimensionless numbers are needed in the modeling (and understanding) of the behavior of particles entrained by turbulent motions.
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Dates et versions

hal-00941502 , version 1 (27-05-2020)

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Lionel Fiabane, Robert Zimmermann, Romain Volk, Jean-François Pinton, Mickaël Bourgoin. On the clustering of finite size particles in turbulence. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2012, 86, pp.035301. ⟨10.1103/PhysRevE.86.035301⟩. ⟨hal-00941502⟩
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