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Fluidic Ratchet Based on Marangoni−Bénard Convection

Stroock, Abraham D. and Ismagilov, Rustem F. and Stone, Howard A. and Whitesides, George M. (2003) Fluidic Ratchet Based on Marangoni−Bénard Convection. Langmuir, 19 (10). pp. 4358-4362. ISSN 0743-7463. doi:10.1021/la026400c.

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A mean flow is observed experimentally in a layer of fluid undergoing Marangoni-Benard convection over a heated substrate that presents a pattern of asymmetrical grooves. The direction of the mean flow is a function of the temperature difference across the layer and of the thickness of the layer; the direction can be controlled by changing these parameters. This system acts as a fluidic ratchet: the local structure of the thermally driven convection interacts with the asymmetry of the local topographical pattern and causes a net, global flow in the fluid. This fluidic ratchet may be useful in handling fluids on macroscopic and microscopic scales.

Item Type:Article
Related URLs:
URLURL TypeDescription
Ismagilov, Rustem F.0000-0002-3680-4399
Whitesides, George M.0000-0001-9451-2442
Additional Information:Copyright © 2003 American Chemical Society. Published In Issue: May 13, 2003. Received August 12, 2002. Revised February 24, 2003. The work in the laboratory of G.M.W. was supported by the Department of Energy (DE-FG02-OOER45852). The work of both G.M.W. and H.A.S. was supported by NSF MRSEC DMR-9809363 and DARPA.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-OOER45852
Subject Keywords:instability; equilibrium; competition
Issue or Number:10
Record Number:CaltechAUTHORS:20130821-160732896
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:40875
Deposited By: Whitney Barlow
Deposited On:28 Aug 2013 21:38
Last Modified:10 Nov 2021 04:23

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