## Remote control of self-assembled microswimmers

- G. Grosjean, G. Lagubeau, A. Darras, M. Hubert, G. Lumay, N. Vandewalle
- Scientific reports
- 2015

- Published 2012 in The European physical journal. E, Soft matter

Swimming in circles occurs in a variety of situations at low Reynolds number. Here we propose a simple model for a swimmer that undergoes circular motion, generalising the model of a linear swimmer proposed by Najafi and Golestanian (Phys. Rev. E 69, 062901 (2004)). Our model consists of three solid spheres arranged in a triangular configuration, joined by two links of time-dependent length. For small strokes, we discuss the motion of the swimmer as a function of the separation angle between its links. We find that swimmers describe either clockwise or anticlockwise circular motion depending on the tilting angle in a non-trivial manner. The symmetry of the swimmer leads to a quadrupolar decay of the far flow field. We discuss the potential extensions and experimental realisation of our model.

@article{LedesmaAguilar2012ACS,
title={A circle swimmer at low Reynolds number.},
author={Rodrigo Ledesma-Aguilar and Hartmut L{\"{o}wen and Julia M. Yeomans},
journal={The European physical journal. E, Soft matter},
year={2012},
volume={35 8},
pages={70}
}