Dynamics of cluster formation in driven dipolar colloids dispersed on a monolayer

TL;DR

This study uses computer simulations to explore how driven dipolar colloids on a monolayer form clusters, highlighting the significant role of hydrodynamic interactions and translation-rotation coupling in their dynamic behavior.

Contribution

It provides new insights into the effects of hydrodynamic interactions and translation-rotation coupling on cluster formation in driven dipolar colloids.

Findings

Hydrodynamic interactions significantly influence clustering behavior.

Translation-rotation coupling impacts particle dynamics.

Simulations reveal differences with and without hydrodynamic effects.

Abstract

We report computer simulation results on the cluster formation of dipolar colloidal particles driven by a rotating external field in a quasi-two-dimensional setup. We focus on the interplay between permanent dipolar and hydrodynamic interactions and its influence on the dynamic behavior of the particles. This includes their individual as well as their collective motion. To investigate these characteristics, we employ Brownian dynamics simulations of a finite system with and without hydrodynamic interactions. Our results indicate that particularly the translation-rotation coupling from the hydrodynamic interactions has a profound impact on the clustering behavior.