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Orientational Ordering in Athermally Sheared, Aspherical, Frictionless Particles
Umeå University, Faculty of Science and Technology, Department of Physics. Département de Physique, École Normale Supérieure de Lyon, Lyon, France; Déepartement de Physique, Université Claude Bernard Lyon 1, Villeurbanne, France.
Umeå University, Faculty of Science and Technology, Department of Physics.
2019 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 122, no 18, article id 188002Article in journal (Refereed) Published
Abstract [en]

We numerically simulate the uniform athermal shearing of bidisperse, frictionless, two-dimensional spherocylinders and three-dimensional prolate ellipsoids. We focus on the orientational ordering of particles as an asphericity parameter α → 0 and particles approach spherical. We find that the nematic order parameter S2 is nonmonotonic in the packing fraction ϕ and that, as α → 0, S2 stays finite at jamming and above. The approach to spherical particles thus appears to be singular. We also find that sheared particles continue to rotate above jamming and that particle contacts preferentially lie along the narrowest width of the particles, even as α → 0.

Place, publisher, year, edition, pages
American Physical Society, 2019. Vol. 122, no 18, article id 188002
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:umu:diva-159376DOI: 10.1103/PhysRevLett.122.188002ISI: 000467404300012OAI: oai:DiVA.org:umu-159376DiVA, id: diva2:1323570
Available from: 2019-06-12 Created: 2019-06-12 Last updated: 2019-06-12Bibliographically approved

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Olsson, Peter

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