Multi-scale clustering in granular surface flows

Details Multi-scale clustering in granular surface flows Multi-scale clustering in granular surface flows

2001-09-20

arxiv.org/abs/cond-mat/0109375v1

Physics

Condensed Matter

4 pages, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.89.034301

We investigate steady granular surface flows in a rotating drum and demonstrate the existence of rigid clusters of grains embedded in the flowing layer. These clusters are fractal and their size is power-law distributed from the grain size scale up to the thickness of the flowing layer. The implications of the absence of a characteristic length scale on available theoretical models of dense granular flows are discussed. Finally, we suggest a possible explanation of the difference between velocity profiles observed in surface flows and in flows down a rough inclined plane.

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