Volume 84, Number 1, October 2008
Article Number 14004
Number of page(s) 5
Section Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics
Published online 19 September 2008
EPL, 84 (2008) 14004
DOI: 10.1209/0295-5075/84/14004

Experimental investigation about cyclic oscillations of a binary vibrofluidized granular mixture in N connected compartments

Yuan Liu1, 2, Qing-Song Mu1, Tian-De Miao1 and Jiang-Hai Liao1

1   College of Civil Engineering and Mechanics, Lanzhou University - Lanzhou 730000, PRC
2   School of Civil Engineering, Lanzhou Jiaotong University - Lanzhou 730070, PRC

received 14 April 2008; accepted in final form 25 August 2008; published October 2008
published online 19 September 2008

The cyclic oscillation behavior (granular clock) of a vibrofluidized granular gas is experimentally investigated in two kinds of N-compartment systems (cyclic and non-cyclic). For a cyclic system, the gas clusters cyclically into one of the compartments in a random order and the interval of the clustering transition has a tendency to decrease with the evolution of time. But for a non-cyclic system, the order and interval of the clustering are invariable. Specially, in a certain transition range a remarkable intermittent clustering behavior is observed at first in our experiments —the granular gas undergoing a cyclic oscillation shows a sudden uniform state and keeps it for a long time until the new cyclic cluster state emerges.

45.70.Mg - Granular flow: mixing, segregation and stratification.
05.45.-a - Nonlinear dynamics and chaos.
47.54.-r - Pattern selection; pattern formation.

© EPLA 2008