INVESTIGADORES
IPPOLITO Irene Paula
artículos
Título:
Rearrangements in a bidimensional packing of discs.
Autor/es:
AGUIRRE, M. A., CALVO, A.,IPPOLITO, I., MEDUS, A., MANCUSO
Revista:
PHYSICAL REVIEW E - STATISTICAL PHYSICS, PLASMAS, FLUIDS AND RELATED INTERDISCIPLINARY TOPICS
Referencias:
Año: 2006 vol. 73 p. 413071 - 413078
ISSN:
1063-651X
Resumen:
Several aspects of the dynamics of a granular two-dimensional (2D) packing of disks slowly tilted until thesystem loses stability and an avalanche takes place are discussed. The evolution of the system, constructed withmonodisperse disks placed on a thin cell, is studied by image analysis. As in the 3D case packing of spheres,the system undergoes several rearrangements of different magnitude before the avalanche takes place. For thicksystems, not only are small rearrangements detected but also displacements of large clusters of disks areobserved in the bulk and on the free surface of the packing. In particular, characteristic angles and theavalanche mass were determined for samples of different heights. On thick systems, velocity fields of largerearrangements are presented and changes in the internal structure of the packing produced by these rearrangementsare analyzed. It is found that the main effects of rearrangements is to increase the disorder of the system.Also, as the disorder of the system increases its stability threshold decreases.