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Hydrodynamic suppression of phase separation in active suspensions.

Matas-Navarro, Ricard and Golestanian, Ramin and Liverpool, Tanniemola B. and Fielding, Suzanne M. (2014) 'Hydrodynamic suppression of phase separation in active suspensions.', Physical review E., 90 (3). 032304.


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.

Item Type:Article
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Publisher statement:Reprinted with permission from the American Physical Society: Physical Review E 90, 032304 © 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:08 August 2014
Date deposited:01 May 2015
Date of first online publication:18 September 2014
Date first made open access:No date available

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