Hydrodynamic suppression of phase separation in active suspensions

Ricard Matas-Navarro*, Ramin Golestanian, Tanniemola B. Liverpool, Suzanne M. Fielding

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

61 Citations (Scopus)

Abstract

We simulate with hydrodynamics a suspension of active disks squirming through a Newtonian fluid. We explore numerically the full range of squirmer area fractions from dilute to close packed and show that "motility induced phase separation," which was recently proposed to arise generically in active matter, and which has been seen in simulations of active Brownian disks, is strongly suppressed by hydrodynamic interactions. We give an argument for why this should be the case and support it with counterpart simulations of active Brownian disks in a parameter regime that provides a closer counterpart to hydrodynamic suspensions than in previous studies.

Original languageEnglish
Article number032304
JournalPhysical Review E: Statistical, Nonlinear, and Soft Matter Physics
Volume90
Issue number3
DOIs
Publication statusPublished - 18 Sep 2014

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