Anomalous boundary deformation induced by enclosed active particles

doi:10.1088/1674-1056/26/10/100502

中国物理B ›› 2017, Vol. 26 ›› Issue (10): 100502-100502.doi: 10.1088/1674-1056/26/10/100502

Anomalous boundary deformation induced by enclosed active particles

Wen-De Tian(田文得), Yan Gu(顾燕), Yong-Kun Guo(郭永坤), Kang Chen(陈康)

1. Center for Soft Condensed Matter Physics & Interdisciplinary Research, College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, China;
2. Kavli Institute for Theoretical Physics China, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2017-04-05 修回日期:2017-05-18 出版日期:2017-10-05 发布日期:2017-10-05
通讯作者: Wen-De Tian, Wen-De Tian E-mail:tianwende@suda.edu.cn;kangchen@suda.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 21474074, 21674078, 21374073, and 21574096).

Anomalous boundary deformation induced by enclosed active particles

Wen-De Tian(田文得)^1,2, Yan Gu(顾燕)¹, Yong-Kun Guo(郭永坤)¹, Kang Chen(陈康)^1,2

1. Center for Soft Condensed Matter Physics & Interdisciplinary Research, College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, China;
2. Kavli Institute for Theoretical Physics China, Chinese Academy of Sciences, Beijing 100190, China

Received:2017-04-05 Revised:2017-05-18 Online:2017-10-05 Published:2017-10-05
Contact: Wen-De Tian, Wen-De Tian E-mail:tianwende@suda.edu.cn;kangchen@suda.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 21474074, 21674078, 21374073, and 21574096).

摘要/Abstract

摘要：

We simulate a two-dimensional model of a round soft boundary enclosed with self-propelled particles. Persistent motion drives these particles to accumulate near the boundary, thereby dramatically deforming the boundary shape through collisions. Quantitative analyses of the boundary shape and the particle distribution show that there are two typical regimes in the variation of the morphology with the increase of self-propulsion of particles. One is under small forces, characterized by the radially inhomogeneous distribution of particles and the suppression of local fluctuations of the almost round boundary, and the other is under large forces, featured by the angularly inhomogeneous distribution of particles and the global shape deformation of the boundary. These two features are strongly cooperative. We also find different mechanisms in the particle relocation at low and high particle concentrations.

关键词: self-propelled particles, boundary, active matter, c onfinement

Abstract:

Key words: self-propelled particles, boundary, active matter, c onfinement

中图分类号: (Fluctuation phenomena, random processes, noise, and Brownian motion)

05.40.-a

64.70.pv (Colloids) 05.40.Jc (Brownian motion)

田文得, 顾燕, 郭永坤, 陈康. Anomalous boundary deformation induced by enclosed active particles[J]. 中国物理B, 2017, 26(10): 100502-100502.

Wen-De Tian(田文得), Yan Gu(顾燕), Yong-Kun Guo(郭永坤), Kang Chen(陈康). Anomalous boundary deformation induced by enclosed active particles[J]. Chin. Phys. B, 2017, 26(10): 100502-100502.

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