Liao Guo-Jun, Klapp Sabine H L
Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany.
Soft Matter. 2021 Jul 21;17(28):6833-6847. doi: 10.1039/d1sm00545f.
Using Brownian dynamics (BD) simulations we investigate the self-organization of a monolayer of chiral active particles with dipolar interactions. Each particle is driven by both, translational and rotational self-propulsion, and carries a permanent point dipole moment at its center. The direction of the translational propulsion for each particle is chosen to be parallel to its dipole moment. Simulations are performed at high dipolar coupling strength and a density below that related to motility-induced phase separation in simple active Brownian particles. Despite this restriction, we observe a wealth of phenomena including formation of two types of vortices, phase separation, and flocking transitions. To understand the appearance and disappearance of vortices in the many-particle system, we further investigate the dynamics of simple ring structures under the impact of self-propulsion.
我们使用布朗动力学（BD）模拟来研究具有偶极相互作用的手性活性粒子单层的自组织。每个粒子都由平移和旋转自推进驱动，并在其中心带有一个永久点偶极矩。每个粒子的平移推进方向被选择为与其偶极矩平行。模拟在高偶极耦合强度和低于简单活性布朗粒子中与运动诱导相分离相关的密度下进行。尽管有这个限制，我们仍观察到大量现象，包括两种类型的涡旋形成、相分离和聚集转变。为了理解多粒子系统中涡旋的出现和消失，我们进一步研究了在自推进影响下简单环形结构的动力学。
