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Tunable Brownian vortex at the interface

Khan, Manas and Sood, AK (2011) Tunable Brownian vortex at the interface. In: Physical Review E - Statistical, Nonlinear and Soft Matter Physics, 83 (4, Par).

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Official URL: http://pre.aps.org/abstract/PRE/v83/i4/e041408

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: Journal Article
Additional Information: Copyright of this article belongs to The American Physical Society.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 30 May 2011 08:10
Last Modified: 30 May 2011 08:10
URI: http://eprints.iisc.ac.in/id/eprint/37793

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