Chirality transitions in a system of active flat spinners

Chirality transitions in a system of active flat spinners

Blog Article

We study in this work the two-dimensional dynamics of an experimental system of pitkin and mother gaston disk-shaped rotors, fluidized by turbulent upflow.Contrary to previous knowledge, our experiments show the same particle chiral geometry can produce flows with different chiralities.In particular, we unveil a conspicuous complex chiral flow which displays multiple persistent vortices with either sign, located randomly in the system.This peculiar phase mediates a continuous transition, which takes place as the kinetic energy input increases, from a flow with positive chirality (one vortex rotating in the same direction as particles spin) to a flow with negative chirality (one vortex in opposite sense to particle spin).We find that these surprising transitions are determined by the specific state of the statistical correlations between particle-spin and translational velocity.

We discuss how these correlations are determined in turn by the combined action of a series kuza growth premium oil of mechanisms (for instance, heat dissipation at the boundaries, particle activity, average kinetic energy.), several of which are unveiled here.