Simulation of Multi-Vortex States in Chiral Quincke Roller System

The collective dynamics of active matter systems holds great promise for a new generation of advanced tunable materials with high adaptability. Here we investigate active chiral fluids composed of Quincke rollers having predesigned and fixed handedness. These systems show the formation of synchronized states in a certain range of excitation parameters. Using a molecular dynamics model, which considers electrostatic and effective hydrodynamic interactions of the individual chiral rollers immersed into a liquid, we explore their collective dynamics and self-organized states. The hydrodynamic interactions are modeled for a rotlet near a no-slip wall for small distances and located between two rigid walls for larger distances. In particular we show the emergence of multi-vortical states for certain chiral and system parameters.