Active Particle Diffusion in Convection Roll Arrays

Abstract

We numerically investigated the Brownian motion of active Janus particles in a linear array of planar counter-rotating convection rolls at high Péclet numbers. Similarly to passive particles, active microswimmers exhibit advection enhanced diffusion, but only for self-propulsion speeds up to a critical value. The diffusion of faster Janus particles is governed by advection along the array's edges, whereby distinct diffusion regimes are observed and characterized. Contrary to passive particles, the relevant spatial distributions of active Janus particles are inhomogeneous. These peculiar properties of active matter are related to the combined action of noise and self-propulsion in a confined geometry and hold regardless of the actual flow boundary conditions.

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Cited by in corpus (5)

• Directed Autonomous Motion and Chiral Separation of Self-Propelled Janus Particles in Convection Roll Arrays
• Escape dynamics of a self-propelled nanorod from circular confinements with narrow openings
• Proposal of a quantum version of active particles via a nonunitary quantum walk
• Enhanced dispersion in an oscillating array of harmonic traps
• Binary Mixtures in Linear Convection Arrays