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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 45, 2004 - Issue 6
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Original Articles

EFFECT OF AIDING AND OPPOSING BUOYANCY ON THE HEAT AND FLUID FLOW ACROSS A SQUARE CYLINDER AT RE = 100

Atul Sharma Department of Mechanical Engineering, Kanpur, India
&
V. Eswaran Department of Mechanical Engineering, Kanpur, India
Pages 601-624 | Received 01 Jun 2003, Accepted 01 Sep 2003, Published online: 17 Aug 2010
 
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Abstract

The effect of buoyancy on the flow structure and heat transfer characteristics of an isolated square cylinder in upward cross flow is investigated numerically for Re = 100 and a Prandtl number of 0.7. The influence of buoyancy on the recirculation length, drag and lift coefficients, Strouhal number, and time-averaged Nusselt number on the cylinder, and on each of its surfaces, is investigated. The degeneration of the Kármán vortex street, previously observed experimentally for the circular cylinder, is also found for the more bluff square cylinder at a critical Richardson number of 0.15. Heat transfer characteristics of the heated/cooled cylinder are studied as a function of Richardson number.

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