Orientational order in concentrated suspensions of spherical microswimmers

Arthur A. Evans, Takuji Ishikawa, Takami Yamaguchi, Eric Lauga

Research output: Contribution to journalArticlepeer-review

99 Citations (Scopus)


We use numerical simulations to probe the dynamics of concentrated suspensions of spherical microswimmers interacting hydrodynamically. Previous work in the dilute limit predicted orientational instabilities of aligned suspensions for both pusher and puller swimmers, which we confirm computationally. Unlike previous work, we show that isotropic suspensions of spherical swimmers are also always unstable. Both types of initial conditions develop long-time polar order of a nature which depends on the hydrodynamic signature of the swimmer but very weakly on the volume fraction up to very high volume fractions.

Original languageEnglish
Article number111702
JournalPhysics of Fluids
Issue number11
Publication statusPublished - 2011 Nov 29


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