POWER-LAW VELOCITY FLUCTUATIONS DUE TO INELASTIC-COLLISIONS IN NUMERICALLY SIMULATED VIBRATED BED OF POWDER

被引：51

作者：

TAGUCHI, YH ^{[1
]}

TAKAYASU, H ^{[1
]}

机构：

[1] TOHOKU UNIV,GRAD SCH INFORMAT SCI,SENDAI 98077,JAPAN

来源：

EUROPHYSICS LETTERS | 1995年 / 30卷 / 08期

关键词：

D O I：

10.1209/0295-5075/30/8/010

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Distribution functions of relative velocities among particles in a vibrated bed of powder are studied both numerically and theoretically. In the solid phase where granular particles remain near their local stable states, the probability distribution is Gaussian. On the other hand, in the fluidized phase, where the particles can exchange their positions, the distribution clearly deviates from Gaussian. This is interpreted with two analogies: aggregation processes and soft-to-hard turbulence transition in thermal convection. The non-Gaussian distribution is well approximated by the t-distribution which is derived theoretically by considering the effect of clustering by inelastic collisions in the former analogy.

引用

页码：499 / 504

页数：6

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