Flagellar swimmers oscillate between pusher- and puller-type swimming

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Gary S Klindt, Benjamin M Friedrich

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 the flagellated green alga Chlamydomonas oscillates between pusher and puller, rendering it an approximately neutral swimmer, when averaging over its full beat cycle. Beyond a typical distance of 100μm from the cell, inertia attenuates oscillatory microflows. We show that hydrodynamic interactions between cells oscillate in time and are of similar magnitude as stochastic swimming fluctuations. From our analysis, we also find that the rate of hydrodynamic dissipation varies in time, which implies that flagellar beat patterns are not optimized with respect to this measure.

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Citations

Jan 6, 2017·Scientific Reports·Julia DölgerAnders Andersen
Mar 1, 2018·Scientific Reports·Mehdi MirzakhanlooMohammad-Reza Alam
Apr 8, 2017·Physical Review Letters·Kenta IshimotoJackson Kirkman-Brown
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Aug 12, 2016·Polymers·Thomas EisensteckenRoland G Winkler
Jul 18, 2020·Physical Review Letters·Dóra BárdfalvyJoakim Stenhammar
May 19, 2018·Physical Review Letters·Fanlong MengRamin Golestanian
Apr 13, 2019·Physical Review Letters·Da WeiDaniel Tam
Jan 11, 2020·Physical Review Letters·Raphaël JeanneretMarco Polin
Dec 31, 2016·Physical Review Letters·Gary S KlindtBenjamin M Friedrich
Mar 20, 2021·Physical Review. E·Nicola GiulianiAntonio DeSimone
Apr 10, 2021·The European Physical Journal. E, Soft Matter·Anton Solovev, Benjamin M Friedrich

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