Clustering and phase separation of circle swimmers dispersed in a monolayer

Soft Matter
Guo-Jun Liao, Sabine H L Klapp

Abstract

We perform Brownian dynamics simulations in two dimensions to study the collective behavior of circle swimmers, which are driven by both, an (effective) translational and rotational self-propulsion, and interact via steric repulsion. We find that active rotation generally opposes motility-induced clustering and phase separation, as demonstrated by a narrowing of the coexistence region upon increase of the propulsion angular velocity. Moreover, although the particles are intrinsically assigned to rotate counterclockwise, a novel state of clockwise vortices emerges at an optimal value of the effective propulsion torque. We propose a simple gear-like model to capture the underlying mechanism of the clockwise vortices.

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Citations

Feb 28, 2019·Soft Matter·Lorenzo Caprini, Umberto Marini Bettolo Marconi
Jul 25, 2019·Physical Review. E·Hartmut Löwen
Feb 25, 2020·Soft Matter·Guo-Jun LiaoSabine H L Klapp
Apr 3, 2020·Soft Matter·Ryan C MaloneyCarol K Hall
Nov 11, 2019·The Journal of Chemical Physics·Xinshuang LiuZhonghuai Hou
May 17, 2019·The Journal of Chemical Physics·Bao-Quan AiYa-Feng He
Sep 11, 2019·Physical Review. E·Demian Levis, Benno Liebchen
Dec 5, 2020·Physical Review Letters·Zhi-Feng HuangHartmut Löwen
May 6, 2021·Soft Matter·Jeffrey M MooreMeredith D Betterton
May 19, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Ryan C Maloney, Carol K Hall

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Methods Mentioned

BETA
electrophoresis

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