title: Looking for self-organized critical behavior in avalanches of slightly cohesive powders.
abstract: 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.
authors.affiliation: Departamento de Electronica y Electromagnetismo, Universidad de Sevilla, Avenida Reina Mercedes s/n, 41012 Sevilla, Spain.
authors.forename: M A
authors.initials: MA
authors.lastname: Quintanilla
authors.forename: J M
authors.initials: JM
authors.lastname: Valverde
authors.forename: A
authors.initials: A
authors.lastname: Castellanos
authors.forename: R E
authors.initials: RE
authors.lastname: Viturro