Emergent spiral vortex of confined biased active particles

Deping Huang, Yunfei Du, Huijun Jiang, and Zhonghuai Hou
Phys. Rev. E 104, 034606 – Published 8 September 2021
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Abstract

Confinement is known to have profound effects on the collective dynamics of many active systems. Here, we investigate a modeled active system in circular confinement consisting of biased active particles, where the direction of active force deviates a biased angle from the principle orientation of the anisotropic interaction. We find that such particles can spontaneously form a spiral vortex with two concentric and counter-rotating regions near the boundary. The emerged vortex can be measured by the vortex order parameter which shows nonmonotonic dependencies on both the biased angle and the strength of the anisotropic interaction. Our work can provide an understanding of such dynamic behaviors and enable different strategies for designing ordered collective behaviors.

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  • Received 15 February 2021
  • Accepted 15 June 2021

DOI:https://doi.org/10.1103/PhysRevE.104.034606

©2021 American Physical Society

Physics Subject Headings (PhySH)

Polymers & Soft Matter

Authors & Affiliations

Deping Huang, Yunfei Du, Huijun Jiang, and Zhonghuai Hou*

  • Department of Chemical Physics and Hefei National Laboratory for Physical Sciences at Microscales, iChEM, University of Science and Technology of China, Hefei, Anhui 230026, China

  • *Author to whom correspondence should be addressed: hzhlj@ustc.edu.cn

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Issue

Vol. 104, Iss. 3 — September 2021

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