Shape matters: Near-field fluid mechanics dominate the collective motions of ellipsoidal squirmers

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
K KyoyaTakuji Ishikawa

Abstract

Microswimmers show a variety of collective motions. Despite extensive study, questions remain regarding the role of near-field fluid mechanics in collective motion. In this paper, we describe precisely the Stokes flow around hydrodynamically interacting ellipsoidal squirmers in a monolayer suspension. The results showed that various collective motions, such as ordering, aggregation, and whirls, are dominated by the swimming mode and the aspect ratio. The collective motions are mainly induced by near-field fluid mechanics, despite Stokes flow propagation over a long range. These results emphasize the importance of particle shape in collective motion.

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Citations

Jan 10, 2017·Soft Matter·Francisco AlarcónIgnacio Pagonabarraga
May 17, 2018·The European Physical Journal. E, Soft Matter·Andreas Zöttl, Holger Stark
May 14, 2016·Physical Review. E·Norihiro OyamaRyoichi Yamamoto
Aug 17, 2016·Soft Matter·Mario TheersRoland G Winkler
Nov 8, 2017·The European Physical Journal. E, Soft Matter·Norihiro OyamaRyoichi Yamamoto
Sep 19, 2020·Physical Review. E·Zhihan HuangTakuji Ishikawa
Nov 10, 2020·APL Bioengineering·Takuji IshikawaKenji Kikuchi

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