Circling particles and drafting in optical vortices
Abstract
Particles suspended in a viscous fluid circle in optical vortices generated by holographic optical-tweezer techniques [Curtis J E and Grier D G 2003 Phys. Rev. Lett. 90 133901]. We model this system and show that hydrodynamic interactions between the circling particles determine their collective motion. We perform a linear-stability analysis to investigate the stability of regular particle clusters and illustrate the limit cycle to which the unstable modes converge. We clarify that drafting of particle doublets is essential for the understanding of the limit cycle.
Cite
@article{arxiv.cond-mat/0405051,
title = {Circling particles and drafting in optical vortices},
author = {Michael Reichert and Holger Stark},
journal= {arXiv preprint arXiv:cond-mat/0405051},
year = {2007}
}
Comments
(i) To be published in J. Phys.: Condens. Matter. (ii) Published version shall contain movies corresponding to figs. 5 and 8; for this preprint, these can be obtained from author (M.R., e-mail see article)