Particle dynamics in sheared granular matter

被引：239

作者：

Losert, W ^{[1
]}

Bocquet, L

Lubensky, TC

Gollub, JP

机构：

[1] Haverford Coll, Dept Phys, Haverford, PA 19041 USA

[2] Univ Penn, Dept Phys, Philadelphia, PA 19104 USA

[3] CNRS, UMR 5672, ENS Lyon, Phys Lab, F-69364 Lyon, France

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.85.1428

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The particle dynamics and shear forces of granular matter in a Couette geometry are determined experimentally. The normalized tangential velocity V(y) declines strongly with distance y from the moving wall, independent of the shear rate and of the shear dynamics. Local rms velocity fluctuations delta V(y) scale with the local velocity gradient to the power 0.4 +/- 0.05. These results agree with a locally Newtonian, continuum model, where the granular medium is assumed to behave asa liquid with a local temperature [delta V(y)](2) and density dependent viscosity.

引用

页码：1428 / 1431

页数：4

共 16 条

[1] EXPERIMENTS ON A GRAVITY-FREE DISPERSION OF LARGE SOLID SPHERES IN A NEWTONIAN FLUID UNDER SHEAR [J].