Collective dynamics in a binary mixture of hydrodynamically coupled microrotors

Kyongmin Yeo, Enkeleida Lushi, Petia M. Vlahovska

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

We study, numerically, the collective dynamics of self-rotating nonaligning particles by considering a monolayer of spheres driven by constant clockwise or counterclockwise torques. We show that hydrodynamic interactions alter the emergence of large-scale dynamical patterns compared to those observed in dry systems. In dilute suspensions, the flow stirred by the rotors induces clustering of opposite-spin rotors, while at higher densities same-spin rotors phase separate. Above a critical rotor density, dynamic hexagonal crystals form. Our findings underscore the importance of inclusion of the many-body, long-range hydrodynamic interactions in predicting the phase behavior of active particles.

Original languageEnglish (US)
Article number188301
JournalPhysical review letters
Volume114
Issue number18
DOIs
StatePublished - May 5 2015

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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