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Disentangled effects of the Reynolds and Stokes numbers on the clustering of heavy particles in turbulence

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Further to intriguing results recently obtained (Fiabane et al., Phys. Rev. E 86, 2012), we study the clustering of heavy particles in homogeneous and isotropic turbulence. We use glass particles of diameter ranging from 150 to 500 microns in flows with the Kolmogorov length scale ranging from 159 to 41 microns. We investigate the particle concentration using a Voronoï tessellation analysis for all the diameters, in flows with different level of turbulence. This makes possible the study of the disentangled effects of the Stokes and Reynolds numbers, comparing particles of the same diameter in different turbulent flows on the one hand, and particles of different diameters in flows with the same level of turbulence.

Author(s):

Lionel Fiabane    
Laboratoire de Physique - ENS de Lyon
France

Romain Volk    
Laboratoire de Physique - ENS de Lyon
France

Jean-François Pinton    
Laboratoire de Physique - ENS de Lyon
France

Mickaël Bourgoin    
LEGI Grenoble
France