Ehrich , Jannik and Kahlen, Marcel Sebastian (2019) Approximating microswimmer dynamics by active Brownian motion: energetics and efficiency. Physical review / E, 99 (1). ISSN 2470-0053

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We consider the dynamics of a microswimmer and show that they can be approximated by active Brownian motion. The swimmer is modeled by coupled overdamped Langevin equations with periodic driving. We compare the energy dissipation of the real swimmer to that of the active Brownian motion model, finding that the latter can massively underestimate the complete dissipation. This discrepancy is related to the inability to infer the full dissipation from partial observation of the complete system. We introduce an efficiency that measures how much of the dissipated energy is spent on forward propulsion.

Item Type: Article
Subjects: Science and mathematics > Physics
Divisions: Faculty of Mathematics and Science > Institute of Physics (IfP)
Date Deposited: 01 Feb 2019 10:14
Last Modified: 01 Feb 2019 10:14
URN: urn:nbn:de:gbv:715-oops-39427

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