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Scallop Theorem and Swimming at the Mesoscale

Hubert, M.; Trosman, O.; Collard, Y.; Sukhov, A.; Harting, J.; Vandewalle, N.; Smith, Ana-Sunčana (2021) Scallop Theorem and Swimming at the Mesoscale. Physical Review Letters, 126 (22). ISSN 0031-9007

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By comparing theoretical modeling, simulations, and experiments, we show that there exists a swimming regime at low Reynolds numbers solely driven by the inertia of the swimmer itself. This is demonstrated by considering a dumbbell with an asymmetry in coasting time in its two spheres. Despite deforming in a reciprocal fashion, the dumbbell swims by generating a nonreciprocal Stokesian flow, which arises from the asymmetry in coasting times. This asymmetry acts as a second degree of freedom, which allows the scallop theorem to be fulfilled at the mesoscopic scale.

Item Type: Article
Uncontrolled Keywords: Locomotion ; Swimming ; Physical Systems ; Active matter ; Low Reynolds number ; swimmers, Self-propelled particles ; Lattice-Boltzmann methods ; Fluid Dynamics
Subjects: NATURAL SCIENCES > Physics
NATURAL SCIENCES > Physics > Condensed Matter Physics
Divisions: Division of Physical Chemistry
Depositing User: Ana Sunčana Smith
Date Deposited: 11 Nov 2021 06:07
DOI: 10.1103/physrevlett.126.224501

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