Multi-scale clustering in granular surface flows
arXiv:cond-mat/0109375 · doi:10.1103/PhysRevLett.89.034301
Abstract
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.
4 pages, submitted to Phys. Rev. Lett
References in corpus (7)
- Creep motion in a granular pile exhibiting steady surface flow
- Geometric origin of mechanical properties of granular materials
- Isostatic phase transition and instability in stiff granular materials
- Continuum description of avalanches in granular media
- Experimental study of granular surface flows via a fast camera: a continuous description
- Transport Coefficients for Granular Media from Molecular Dynamics Simulations
- Granular 'glass' transition
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