Dynamics of Enhanced Tracer Diffusion in Suspensions of Swimming Eukaryotic Microorganisms
作者： Kyriacos C. Leptos , Jeffrey S. Guasto , J. P. Gollub , Adriana I. Pesci , Raymond E. Goldstein
DOI: 10.1103/PHYSREVLETT.103.198103
关键词:
摘要: In contexts such as suspension feeding in marine ecologies there is an interplay between Brownian motion of nonmotile particles and their advection by flows from swimming microorganisms. As a laboratory realization, we study passive tracers suspensions eukaryotic swimmers, the alga Chlamydomonas reinhardtii. While cells behave ballistically over short intervals, diffusively, with time-dependent but self-similar probability distribution function displacements consisting Gaussian core robust exponential tails. We emphasize role flagellar beating creating oscillatory that exceed far each swimmer.
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