Collective dynamics in a binary mixture of hydrodynamically coupled micro-rotors
Abstract
We study, numerically, the collective dynamics of self-rotating nonaligning particles by considering a monolayer of spheres driven by constant clockwise or counterclockwise torques. We show that hydrodynamic interactions alter the emergence of large-scale dynamical patterns compared to those observed in dry systems. In dilute suspensions, the flow stirred by the rotors induces clustering of opposite-spin rotors, while at higher densities same-spin rotors phase separate. Above a critical rotor density, dynamic hexagonal crystals form. Our findings underscore the importance of inclusion of the many-body, long-range hydrodynamic interactions in predicting the phase behavior of active particles.
Cite
@article{arxiv.1410.2878,
title = {Collective dynamics in a binary mixture of hydrodynamically coupled micro-rotors},
author = {Kyongmin Yeo and Enkeleida Lushi and Petia M. Vlahovska},
journal= {arXiv preprint arXiv:1410.2878},
year = {2016}
}
Comments
Authors' edited version. Includes 4 page appendix with supplementary information and 5 figures