Shear banding in mesoscopic dusty plasma liquids

被引：50

作者：

Chan, CL ^{[1
]}

Woon, WY ^{[1
]}

I, L ^{[1
]}

机构：

[1] Natl Cent Univ, Dept Phys, Chungli 32054, Taiwan

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.93.220602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We experimentally demonstrate shear banding and construct a microscopic dynamic picture of a sheared 2D mesoscopic dust Coulomb liquid at the kinetic level. Under the topological constraints from the discreteness and finite boundary, the nonlinear threshold-type response of motion to the local stress induced by thermal and external drives leads to shear thinning and the enhanced avalanche-type local topological transitions with stress relaxation in the form of clusters. It causes the formation of the outer shear bands in which the mean shear rate, the velocity fluctuations, and the structural rearrangement rate are all enhanced, and leaves a weakly perturbed center band. The typical size of the cooperative hopping vortex (about three interparticle distance) sets up a common length scale for the widths of the confinement induced layering and the shear band.

引用

页数：4

共 22 条

[1] DIRECT OBSERVATION OF COULOMB CRYSTALS AND LIQUIDS IN STRONGLY COUPLED RF DUSTY PLASMAS [J].