Internal Avalanches in a Granular Medium

Details Internal Avalanches in a Granular Medium Internal Avalanches in a Granular Medium

1998-08-04

arxiv.org/abs/cond-mat/9808030v1

Phys. Rev. E. 58, R6935 (1998)

Physics

Condensed Matter

Soft Condensed Matter

4 pages (Revtex), Four ps figures (included)

Scientific paper

10.1103/PhysRevE.58.R6935

Avalanches of grain displacements can be generated by creating local voids within the interior of a granular material at rest in a bin. Modeling such a two-dimensional granular system by a collection of mono-disperse discs, the system on repeated perturbations, shows all signatures of Self-Organized Criticality. During the propagation of avalanches the competition among grains creates arches and in the critical state a distribution of arches of different sizes is obtained. Using a cellular automata model we demonstrate that the existence of arches determines the universal behaviour of the model system.

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