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Flow visualization in turbulent free convection over horizontal smooth and grooved surfaces

Subudhi, Sudhakar and Arakeri, Jaywant H (2012) Flow visualization in turbulent free convection over horizontal smooth and grooved surfaces. In: INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 39 (3). pp. 414-418.

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Official URL: http://dx.doi.org/10.1016/j.icheatmasstransfer.201...


The present paper discusses the flow visualization for turbulent free convection in a tank of water with the bottom surface being a smooth or a grooved surface and the top of the water surface exposed to ambient. The grooved surface is of parallel 90 degrees V-grooves with groove height of 10 mm and groove width of 20 mm. The experiment is carried out with aspect ratio (AR) of 2.9 and Rayleigh number (Ra) in the range, 1.3 x 10(7) - 4 x 10(7). Here AR is the aspect ratio (= width of fluid layer/height of fluid layer). Heat flux at the bottom surface is from electrical heating. From the pH-dye visualization, interesting flow structures are observed and these structures are analyzed with the help of plumes dynamics and temperature variations with time. (C) 2011 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Elsevier
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: review EPrints Reviewer
Date Deposited: 07 Aug 2012 05:00
Last Modified: 07 Aug 2012 05:00
URI: http://eprints.iisc.ac.in/id/eprint/44517

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