Rise of a Brazil nut: A transition line

被引:22
作者
Godoy, Sergio [1 ]
Risso, Dino [2 ]
Soto, Rodrigo [1 ]
Cordero, Patricio [1 ]
机构
[1] Univ Chile, Dept Fis, FCFM, Santiago, Chile
[2] Univ Bio Bio, Dept Fis, Concepcion, Chile
来源
PHYSICAL REVIEW E | 2008年 / 78卷 / 03期
关键词
D O I
10.1103/PhysRevE.78.031301
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
Using molecular dynamics we study the behavior of a large particle immersed in a bed of smaller ones. The system is bidimensional, consisting of many rough inelastic hard disks of equal size plus a larger one: the intruder. All possible parameters of the system are kept fixed except for two dimensionless parameters determining the frequency and amplitude of the vibrating base. A systematic exploration of this parameter space leads to determining a transition line separating a zone in which the Brazil nut effect is observed and one in which it is not. The results strongly suggest that, in the region of the parameter space in which the study is made, there is a minimum amplitude and a maximum frequency for the Brazil nut effect to take place. These results compare well with isolated results from other authors.
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页数:6
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