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Orientational order and alignment of elongated particles induced by shear

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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. doi:10.1103/PhysRevLett.108.228302 ISSN 0031-9007.

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.108.228302

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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, Engineering and Medicine > Research Centres > Centre for Complexity Science
Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 1 June 2012
Dates:
DateEvent
1 June 2012Published
Volume: Vol.108
Number: No.22
Number of Pages: 5
Page Range: Article: 228302
DOI: 10.1103/PhysRevLett.108.228302
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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