Brownian dynamics of a microswimmer

Details Brownian dynamics of a microswimmer Brownian dynamics of a microswimmer

2007-09-06

arxiv.org/abs/0709.0792v1

Eur. Phys. J. Special Topics 157, 149 (2008)

Physics

Fluid Dynamics

Submitted

Scientific paper

10.1140/epjst/e2008-00637-7

We report on dynamic properties of a simple model microswimmer composed of three spheres and propelling itself in a viscous fluid by spinning motion of the spheres under zero net torque constraint. At a fixed temperature and increasing the spinning frequency, the swimmer demonstrates a transition from dissipation-dominated to a pumping-dominated motion regime characterized by negative effective friction coefficient. In the limit of high frequencies, the diffusion of the swimmer can be described by a model of an active particle with constant velocity.

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