Motion-reversal in a simple microscopic swimmer

Details Motion-reversal in a simple microscopic swimmer Motion-reversal in a simple microscopic swimmer

2007-05-18

arxiv.org/abs/0705.2669v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 4 figures

Scientific paper

We study the motion of a microscopic swimmer composed of a semiflexible polymer anchored at the surface of a magnetic sphere using hydrodynamic simulations and scaling arguments. The swimmer is driven by a rotating magnetic field, and displays forward and backward motion depending on the value of the rotational frequency. In particular, the system exhibits forward thrust for frequencies below a critical frequency $\omega^*$, while above $\omega^*$ the motion is reversed.

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