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Clustering and phase separation of circle swimmers dispersed in a monolayer

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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.

Graphical abstract: Clustering and phase separation of circle swimmers dispersed in a monolayer

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Publication details

The article was received on 04 Jul 2018, accepted on 07 Sep 2018 and first published on 10 Sep 2018


Article type: Paper
DOI: 10.1039/C8SM01366G
Citation: Soft Matter, 2018, Advance Article
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    Clustering and phase separation of circle swimmers dispersed in a monolayer

    G. Liao and S. H. L. Klapp, Soft Matter, 2018, Advance Article , DOI: 10.1039/C8SM01366G

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