Collective Effects in the Horizontal Transport of Vertically Vibrated Granular Layers

Details Collective Effects in the Horizontal Transport of Vertically Vibrated Granular Layers Collective Effects in the Horizontal Transport of Vertically Vibrated Granular Layers

1998-10-05

arxiv.org/abs/cond-mat/9810039v1

Physics

Condensed Matter

Statistical Mechanics

13 pages (4 figures). submitted to PRL

Scientific paper

Motivated by recent advances in the investigation of fluctuation-driven ratchets and flows in excited granular media, we have carried out experimental and simulational studies to explore the horizontal transport of granular particles in a vertically vibrated system whose base has a sawtooth-shaped profile. The resulting material flow exhibits novel collective behavior, both as a function of the number of layers of particles and the driving frequency; in particular, under certain conditions, increasing the layer thickness leads to a reversal of the current, while the onset of transport as a function of frequency can occur either gradually or suddenly in a manner reminiscent of a phase transition.

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