Flagellar swimmers oscillate between pusher- and puller-type swimming
arXiv:1504.05775 · doi:10.1103/PhysRevE.92.063019
Abstract
Self-propulsion of cellular microswimmers generates flow signatures, commonly classified as pusher- and puller-type, which characterize hydrodynamic interactions with other cells or boundaries. Using experimentally measured beat patterns, we compute that flagellated alga and sperm oscillate between pusher and puller. Beyond a typical distance of 100 um from the swimmer, inertia attenuates oscillatory micro-flows. We show that hydrodynamic interactions between swimmers oscillate in time and are of similar magnitude as stochastic swimming fluctuations.
12 pages, 4 color figures
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- Nonlinear dynamics and fluctuations in biological systems (Habilitation thesis)