Clustering transitions in vibrofluidized magnetized granular materials

被引：63

作者：

Blair, DL ^{[1
]}

Kudrolli, A ^{[1
]}

机构：

[1] Clark Univ, Dept Phys, Worcester, MA 01610 USA

来源：

PHYSICAL REVIEW E | 2003年 / 67卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevE.67.021302

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：

We study the effects of long-range interactions on the phases observed in cohesive granular materials. At high vibration amplitudes, a gas of magnetized particles is observed with velocity distributions similar to nonmagnetized particles. Below a transition temperature compact clusters are observed to form and coexist with single particles. The cluster growth rate is consistent with a classical nucleation process. However, the temperature of the particles in the clusters is significantly lower than the surrounding gas, indicating a breakdown of equipartition. If the system is quenched to low temperatures, a metastable network of connected chains self-assemble due to the anisotropic nature of magnetic interactions between particles.

引用

页数：4

共 27 条

[1] Electrostatically driven granular media: Phase transitions and coarsening [J].