Dynamic jamming fronts

被引：49

作者：

Waitukaitis, S. R. ^{[1
,2
]}

Roth, L. K. ^{[3
]}

Vitelli, V. ^{[4
]}

Jaeger, H. M. ^{[1
,2
]}

机构：

[1] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[2] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA

[3] St Olaf Coll, Dept Phys, Northfield, MN 55057 USA

[4] Leiden Univ, Inst Lorentz Theoret Phys, NL-2333 CA Leiden, Netherlands

来源：

EPL | 2013年 / 102卷 / 04期

基金：

美国国家科学基金会;

关键词：

TRANSITION; STRESS;

D O I：

10.1209/0295-5075/102/44001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We describe a model experiment for dynamic jamming: a two-dimensional collection of initially unjammed disks that are forced into the jammed state by uniaxial compression via a rake. This leads to a stable densification front that travels ahead of the rake, leaving regions behind it jammed. Using disk conservation in conjunction with an upper limit to the packing fraction at jamming onset, we predict the front speed as a function of packing fraction and rake speed. However, we find that the jamming front has a finite width, a feature that cannot be explained by disk conservation alone. This width appears to diverge on approach to jamming, which suggests that it may be related to growing lengthscales encountered in other jamming studies. editor's choice Copyright (C) EPLA, 2013

引用

页数：6

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