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Effect of Channel Confinement on Mixed Convective Flow Past an Equilateral Triangular Cylinder

Varma, Nitish and Dulhani, Jay P and Dalal, Amaresh and Sarkar, Sandip and Ganguly, Suvankar (2015) Effect of Channel Confinement on Mixed Convective Flow Past an Equilateral Triangular Cylinder. In: JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 137 (12, SI).

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Official URL: http://dx.doi.org/10.1115/1.4030960


The present work investigates the mixed convective flow and heat transfer characteristics past a triangular cylinder placed symmetrically in a vertical channel. At a representative Reynolds number, Re = 100, simulations are carried out for the blockage ratios beta = 1/3; 1/4; and 1/6. Effect of aiding and opposing buoyancy is brought about by varying the Richardson number in the range -1.0 <= Ri <= 1.0. At a blockage ratio of 1/3, suppression of vortex shedding is found at Ri = 1, whereas von Karman vortex street is seen both at beta = 1/4 and 1/6, respectively. This is the first time that such behavior of blockage ratio past a triangular cylinder in the present flow configuration is reported. Drag coefficient increases progressively with increasing Ri and a slightly higher value is noticed at beta = 1/3. For all b, heat transfer increases with increasing Ri. Flattening of Nu(avg)-Ri curve beyond Ri > 0: 75 is observed at beta = 1/3.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ASME, TWO PARK AVE, NEW YORK, NY 10016-5990 USA
Keywords: triangular cylinder; mixed convection; Richardson number; blockage ratio
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 10 Dec 2015 05:51
Last Modified: 10 Dec 2015 05:51
URI: http://eprints.iisc.ac.in/id/eprint/52862

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