Narrow-escape time and sorting of active particles in circular domains

Abstract

It is now well established that microswimmers can be sorted or segregated fabricating suitable microfluidic devices or using external fields. A natural question is how these techniques can be employed for dividing swimmers of different motility. In this paper, using numerical simulations in the dilute limit, we investigate how motility parameters (time of persistence and velocity) impacts the narrow-escape time of active particles from circular domains. We show that the escape time undergoes a crossover between two asymptotic regimes. The control parameters of the crossover is the ratio between persistence length of the active motion and the typical length scale of the circular domain. We explore the possibility of taking advantage of this finding for sorting active particles by motility parameters.

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Cited by in corpus (10)

• Escape kinetics of self-propelled particles from a circular cavity
• The escape problem for active particles confined to a disc
• Optimal mean first-passage time of a run-and-tumble particle in a class of one-dimensional confining potentials
• Selecting active matter according to motility in an acoustofluidic setup: Self-propelled particles and sperm cells
• Escape dynamics of a self-propelled nanorod from circular confinements with narrow openings
• Exploring run-and-tumble movement in confined settings through simulation
• Mean first passage time of active Brownian particles in two dimensions
• Motility-dependent selective transport of active matter in trap arrays: Separation methods based on trapping-detrapping and deterministic lateral displacement
• Local entropy production rate of run-and-tumble particles
• Correlated escape of active particles across a potential barrier