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 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 EARTHPASTE LEMON TWIST 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 little girls bikini set 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 of mechanisms (for instance, heat dissipation at the boundaries, particle activity, average kinetic energy.

), several of which are unveiled here.