Granular Phase Transition as a Precondition for Segregation

Titelangaben

Aumaître, Sébastien ; Schnautz, Tobias ; Kruelle, Christof A. ; Rehberg, Ingo:
Granular Phase Transition as a Precondition for Segregation.
In: Physical Review Letters. Bd. 90 (2003) Heft 11 . - 114302.
ISSN 1079-7114
DOI: https://doi.org/10.1103/PhysRevLett.90.114302

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Abstract

Experimental results are presented on the segregation of a mixture of spheres with two different sizes, rolling on a circularly vibrating table. Beyond a critical density of particles a demixing occurs leading to a clustering of the larger ones. A monodisperse layer of spheres shows a liquid-solid-like phase transition at a slightly lower critical density. These critical particle densities are both found to be independent of the driving frequency, but decrease with increasing vibration amplitude.