Orientational order and alignment of elongated particles induced by shear

Tamás Börzsönyi, Balázs Szabó, Gábor Törös, Sandra Wegner, János Török, Ellák Somfai, Tomasz Bien, Ralf Stannarius

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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.

Original languageEnglish
Article number228302
JournalPhysical review letters
Volume108
Issue number22
DOIs
Publication statusPublished - May 30 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Börzsönyi, T., Szabó, B., Törös, G., Wegner, S., Török, J., Somfai, E., Bien, T., & Stannarius, R. (2012). Orientational order and alignment of elongated particles induced by shear. Physical review letters, 108(22), [228302]. https://doi.org/10.1103/PhysRevLett.108.228302