| Issue |
Europhys. Lett.
Volume 74, Number 4, May 2006
|
|
|---|---|---|
| Page(s) | 719 - 725 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2006-10017-9 | |
| Published online | 07 April 2006 | |
Surmounting barriers: The benefit of hydrodynamic interactions
1
2. Physikalisches Institut, Universität Stuttgart - Pfaffenwaldring 57 D-70550 Stuttgart, Germany
2
Universität Konstanz, Fachbereich Physik - D-78457 Konstanz, Germany
3
Max-Planck Institute for Dynamics and Self-Organization - Bunsenstr. 10 D-37073 Göttingen, Germany
Corresponding author: holger.stark@ds.mpg.de
Received:
10
January
2006
Accepted:
9
March
2006
We experimentally and theoretically investigate the collective behavior of three colloidal particles that are driven by a constant force along a toroidal trap. Due to hydrodynamic interactions, a characteristic limit cycle is observed. When we additionally apply a periodic sawtooth potential, we find a novel caterpillar-like motional sequence that is dominated by hydrodynamic interactions and promotes the surmounting of potential barriers by the particles.
PACS: 82.70.Dd – Colloids / 67.40.Hf – Hydrodynamics in specific geometries, flow in narrow channels / 83.80.Hj – Suspensions, dispersions, pastes, slurries, colloids
© EDP Sciences, 2006
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