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

K. Kyoya, D. Matsunaga, Y. Imai, T. Omori, T. Ishikawa

Research output: Contribution to journalArticle

12 Citations (Scopus)

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.

Original languageEnglish
Article number063027
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume92
Issue number6
DOIs
Publication statusPublished - 2015 Dec 28

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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