Granular segregation driven by particle interactions

We report the results of an experimental study of particle-particle interactions in a horizontally shaken granular layer that undergoes a second order phase transition from a binary gas to a segregation liquid as the packing fraction C is increased. By focusing on the behavior of individual particle...

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Bibliographic Details
Published in:Physical review letters 2015-05, Vol.114 (17), p.178002-178002, Article 178002
Main Authors: Lozano, C, Zuriguel, I, Garcimartín, A, Mullin, T
Format: Article
Language:English
Subjects:
Attraction
Clusters
Dynamic tests
Liquids
Particle interactions
Power law
Segregations
Splitting
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Summary:We report the results of an experimental study of particle-particle interactions in a horizontally shaken granular layer that undergoes a second order phase transition from a binary gas to a segregation liquid as the packing fraction C is increased. By focusing on the behavior of individual particles, the effect of C is studied on (1) the process of cluster formation, (2) cluster dynamics, and (3) cluster destruction. The outcomes indicate that the segregation is driven by two mechanisms: attraction between particles with the same properties and random motion with a characteristic length that is inversely proportional to C. All clusters investigated are found to be transient and the probability distribution functions of the separation times display a power law tail, indicating that the splitting probability decreases with time.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.114.178002