Swimmer-microrheology

Kento Yasuda; Ryuichi Okamoto; Shigeyuki Komura

doi:10.7566/JPSJ.86.043801

Swimmer-microrheology

Kento Yasuda, Ryuichi Okamoto, Shigeyuki Komura

Tokyo Metropolitan University

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

We discuss the locomotion of a three-sphere microswimmer in a viscoelastic medium and propose a new type of active microrheology. We derive a relation that connects the average swimming velocity and the frequency-dependent viscosity of the surrounding medium. In this relation, the viscous contribution can exist only when the time-reversal symmetry is broken, whereas the elastic contribution is present only when the structural symmetry of the swimmer is broken. Purcell's scallop theorem breaks down for a three-sphere swimmer in a viscoelastic medium.

Original language	English
Article number	043801
Journal	Journal of the Physical Society of Japan
Volume	86
Issue number	4
DOIs	https://doi.org/10.7566/JPSJ.86.043801
Publication status	Published - 15 Apr 2017
Externally published	Yes

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10.7566/JPSJ.86.043801

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AU - Okamoto, Ryuichi

AU - Komura, Shigeyuki

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N2 - We discuss the locomotion of a three-sphere microswimmer in a viscoelastic medium and propose a new type of active microrheology. We derive a relation that connects the average swimming velocity and the frequency-dependent viscosity of the surrounding medium. In this relation, the viscous contribution can exist only when the time-reversal symmetry is broken, whereas the elastic contribution is present only when the structural symmetry of the swimmer is broken. Purcell's scallop theorem breaks down for a three-sphere swimmer in a viscoelastic medium.

AB - We discuss the locomotion of a three-sphere microswimmer in a viscoelastic medium and propose a new type of active microrheology. We derive a relation that connects the average swimming velocity and the frequency-dependent viscosity of the surrounding medium. In this relation, the viscous contribution can exist only when the time-reversal symmetry is broken, whereas the elastic contribution is present only when the structural symmetry of the swimmer is broken. Purcell's scallop theorem breaks down for a three-sphere swimmer in a viscoelastic medium.

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Swimmer-microrheology

Abstract

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