Surface tension-driven convection patterns in two liquid layers

Juel, A. and Burgess, J.M. and McCormick, W.D. and Swift, J.B. and Swinney, H.L. (2000) Surface tension-driven convection patterns in two liquid layers. Physica D, 143 (1-4). pp. 169-186. ISSN 0167-2789

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Two superposed liquid layers display a variety of convective phenomena that are inaccessible in the traditional system where the upper layer is a gas. We consider several pairs of immiscible liquids. Once the liquids have been selected, the applied temperature difference and the depths of the layers are the only independent control parameters. Using a perfluorinated hydrocarbon and silicone oil system, we have made the first experimental observation of convection with the top plate hotter than the bottom plate. Since the system is stably stratified, this convective flow is solely due to thermocapillary forces. We also have found oscillatory convection at onset in an acetonitrile and n-hexane system heated from below. The experimental observations are in reasonable agreement with linear stability analyses.

Item Type: Article
Uncontrolled Keywords: Bénard–Marangoni convection; Oscillatory convection; Convection heating from above; Thermo-solutal
Subjects: PACS 2010, the AIP's Physics and Astronomy Classification Scheme > 40 ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID MECHANICS > 47 Fluid dynamics
Depositing User: Ms Lucy van Russelt
Date Deposited: 02 Nov 2007
Last Modified: 20 Oct 2017 14:12

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