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SYNT: Neue Transportphänomene - Vom Maxwell-Dämon zum Verkehrsstau

SYNT 0: Neue Transportph
änomene – Vom Maxwell-D
ämon zum Verkehrsstau

SYNT 0.9: Talk

Tuesday, March 27, 2001, 17:30–17:45, S 7

Hysteretic Clustering and Biased Flow in Granular Gas — •Ko van der Weele, Devaraj van der Meer, and Detlef Lohse — Physics Department, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands

Granular material is vibro-fluidized in N connected compartments. For sufficiently strong shaking the gas is equi-partitioned, but if the shaking intensity is lowered, the uniform distribution gives way to a clustered state. This phase transition is of 2nd order for N = 2 and of 1st order for N ≥ 3. In particular, the latter is hysteretic. We also discuss the case when the gas flow is directed towards one side, with special attention to the competition between stationary clusters and running patterns. The observed phenomena are accounted for within a dynamical flux model.