Impact of hydrodynamics on effective interactions in suspensions of active and passive matter

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Ryan C Krafnick, Angel E García

Abstract

Passive particles exhibit unique properties when immersed in an active bath of self-propelling entities. In particular, an effective attraction can appear between particles that repel each other when in a passive solution. Here we numerically study the effect of hydrodynamics on an active-passive hybrid system, where we observe qualitative differences as compared to simulations with excluded volume effects alone. The results shed light on an existing discrepancy in pair lifetimes between simulation and experiment, due to the hydrodynamically enhanced stability of coupled passive particles.

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Citations

Apr 14, 2016·Proceedings of the National Academy of Sciences of the United States of America·Joshua P SteimelAlfredo Alexander-Katz
Sep 15, 2016·Physical Review. E·S A Mallory, A Cacciuto
May 2, 2020·Physical Review Letters·Peng LiuMingcheng Yang
Sep 25, 2020·Scientific Reports·Mahmoud Sebtosheikh, Ali Naji
Aug 15, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·S A MalloryA Cacciuto

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