Artículos de revistas
Swirling granular solidlike clusters
Fecha
2000Registro en:
Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Volumen 61, Issue 4, 2018, Pages 4069-4077
1063651X
10.1103/PhysRevE.61.4069
Autor
Scherer, Michael A.
Kötter, Karsten
Markus, Mario
Goles, Eric
Rehberg, Ingo
Institución
Resumen
Experiments and three-dimensional numerical simulations are presented to elucidate the dynamics of granular material in a cylindrical dish driven by a horizontal, periodic motion. The following phenomena are obtained both in the experiments and in the simulations: First, for large particle numbers N the particles describe hypocycloidal trajectories. In this state the particles are embedded in a solidlike cluster (“pancake”) which counter-rotates with respect to the external driving (reptation). Self-organization within the cluster occurs such that the probability distribution of the particles consists of concentric rings. Second, the system undergoes phase transitions. These can be identified by changes of the quantity [Formula Presented] [Formula Presented] is the mean kinetic energy) between zero (rotation), positive (reptation), and negative values (appearance of the totality of concentric rings). © 2000 The American Physical Society.