摘要
Computer simulations were performed to study the dense mixtures of passive particles and active particles in two dimensions.Two systems with different kinds of passive particles(e.g.,spherical particles and rod-like particles)were considered.At small active forces,the high-density and low-density regions emerge in both systems,indicating a phase separation.At higher active forces,the systems return to a homogeneous state with large fluctuation of particle area in contrast with the thermo-equilibrium state.Structurally,the rod-like particles accumulate loosely due to the shape anisotropy compared with the spherical particles at the high-density region.Moreover,there exists a positive correlation between Voronoi area and velocity of the particles.Additionally,a small number of active particles capably give rise to super-diffusion of passive particles in both systems when the self-propelled force is turned on.
作者
Yan Wang
Zhuanglin Shen
Yiqi Xia
Guoqiang Feng
Wende Tian
王艳;谌庄琳;夏益祺;冯国强;田文得(National Laboratory of Solid State Microstructures and Department of Physics,Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China;Center for Soft Condensed Matter Physics&Interdisciplinary Research,School of Physical Science and Technology,Soochow University,Suzhou 215006,China;Department of Chemical Engineering,Macromolecular Science and Engineering,University of Michigan,Ann Arbor,Michigan 48109,United States)
基金
Project supported by the National Natural Science Foundation of China(Grant Nos.21674078,21474074,21574096,21774091,and 21374073)
Overseas Research Program of Jiangsu,China(2019).
作者简介
Corresponding author:田文得.E-mail:tianwende@suda.edu.cn。
