Khan, Manas ; Sood, A. K. (2011) Tunable Brownian vortex at the interface Physical Review E - Statistical, Nonlinear and Soft Matter Physics, 83 (4). 041408 _1-041408_5. ISSN 1539-3755
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Official URL: http://pre.aps.org/abstract/PRE/v83/i4/e041408
Related URL: http://dx.doi.org/10.1103/PhysRevE.83.041408
Abstract
A general kind of Brownian vortices is demonstrated by applying an external nonconservative force field to a colloidal particle bound by a conservative optical trapping force at a liquid-air interface. As the liquid medium is translated at a constant velocity with the bead trapped at the interface, the drag force near the surface provides enough rotational component to bias the particle's thermal fluctuations in a circulatory motion. The interplay between the thermal fluctuations and the advection of the bead in constituting the vortex motions is studied, and we infer that the angular velocity of the circulatory motion offers a comparative measure of the interface fluctuations.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Physical Society. |
ID Code: | 50230 |
Deposited On: | 22 Jul 2011 14:03 |
Last Modified: | 18 May 2016 04:35 |
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