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SWEEP-STICK MECHANISMS OF INERTIAL PARTICLES IN TURBULENCE: A COMPARISON OF VORONOÏ ANALYSIS IN DNS AND EXPERIMENTS

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Particle laden flows are of big interest in many industrial and natural systems. When the carrier flow is turbulent, a striking phenomenon called preferential concentration takes place: particles denser than the fluid have the tendency to in-homogeneously distribute in space, forming clusters and depleted regions. We present a study of preferential concentration and clustering in homogeneous and isotropic turbulence based on Voronoï diagrams.

Author(s):

Martin Obligado    
Laboratoire des Écoulements Géophysiques et Industriels, CNRS/UJF/G-INP UMR 5519, BP53, 38041, Grenoble
France

Alain Cartellier    
Laboratoire des Écoulements Géophysiques et Industriels, CNRS/UJF/G-INP UMR 5519, BP53, 38041, Grenoble
France

Pablo Mininni    
Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires
Argentina

Mickael Bourgoin    
Laboratoire des Écoulements Géophysiques et Industriels, CNRS/UJF/G-INP UMR 5519, BP53, 38041, Grenoble
France