Looking for self-organized critical behavior in avalanches of slightly cohesive powders

We report results from a statistical analysis of avalanches of cohesive powders in a slowly rotated drum. Interparticle adhesion, which diminishes the effect of inertia and whose magnitude strongly fluctuates in a local scale, makes avalanches in slightly cohesive powders eligible for displaying sel...

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Bibliographic Details
Published in:Physical review letters 2001-11, Vol.87 (19), p.194301-194301, Article 194301
Main Authors: Quintanilla, M A, Valverde, J M, Castellanos, A, Viturro, R E
Format: Article
Language:English
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Summary:We report results from a statistical analysis of avalanches of cohesive powders in a slowly rotated drum. Interparticle adhesion, which diminishes the effect of inertia and whose magnitude strongly fluctuates in a local scale, makes avalanches in slightly cohesive powders eligible for displaying self-organized criticality. However, the results show that avalanche sizes, time interval between avalanches, and maximum stable angle do not follow a power-law distribution. Otherwise, these parameters scale with powder cohesiveness.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.87.194301