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arXiv · 1201.0629

Nonlinear dynamics of a microswimmer in Poiseuille flow

Andreas Zöttl·Holger Stark
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Abstract

We study the three-dimensional dynamics of a spherical microswimmer in cylindrical Poiseuille flow which can be mapped onto a Hamiltonian system. Swinging and tumbling trajectories are identified. In 2D they are equivalent to oscillating and circling solutions of a mathematical pendulum. Hydrodynamic interactions between the swimmer and confining channel walls lead to dissipative dynamics and result in stable trajectories, different for pullers and pushers. We demonstrate this behavior in the dipole approximation of the swimmer and with simulations using the method of multi-particle collision dynamics.

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Andreas Zöttl, Holger Stark. 2012-01-03. Nonlinear dynamics of a microswimmer in Poiseuille flow. https://doi.org/10.1103/physrevlett.108.218104

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