Avalanche Dynamics in Wet Granular Materials

Details Avalanche Dynamics in Wet Granular Materials Avalanche Dynamics in Wet Granular Materials

2002-04-18

arxiv.org/abs/cond-mat/0204399v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

5 pages, 3 figures in color, REVTeX4, for smaller pdfs see http://angel.elte.hu/~tegzes/condmat.html

Scientific paper

10.1103/PhysRevLett.89.094301

We have studied the dynamics of avalanching wet granular media in a rotating drum apparatus. Quantitative measurements of the flow velocity and the granular flux during avalanches allow us to characterize novel avalanche types unique to wet media. We also explore the details of viscoplastic flow (observed at the highest liquid contents) in which there are lasting contacts during flow, leading to coherence across the entire sample. This coherence leads to a velocity independent flow depth at high rotation rates and novel robust pattern formation in the granular surface.

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