Börzsönyi, Tamás, Szabó, Balázs, Törös, Gábor, Wegner, Sandra, Török, János, Somfai, Ellák, Bien, Tomasz and Stannarius, Ralf. (2012) Orientational order and alignment of elongated particles induced by shear. Physical Review Letters, Vol.108 (No.22). Article: 228302. ISSN 0031-9007

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Abstract

Shear induced alignment of elongated particles is studied experimentally and numerically. We show that shear alignment of ensembles of macroscopic particles is comparable even on a quantitative level to simple molecular systems, despite the completely different types of particle interactions. We demonstrate that for dry elongated grains the preferred orientation forms a small angle with the streamlines, independent of shear rate across three decades. For a given particle shape, this angle decreases with increasing aspect ratio of the particles. The shear-induced alignment results in a considerable reduction of the effective friction of the granular material.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Centre for Complexity Science Faculty of Science > Physics
Journal or Publication Title:	Physical Review Letters
Publisher:	American Physical Society
ISSN:	0031-9007
Official Date:	1 June 2012
Volume:	Vol.108
Number:	No.22
Number of Pages:	5
Page Range:	Article: 228302
Identification Number:	10.1103/PhysRevLett.108.228302
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/46144

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