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RESEARCH PAPERS

Mixed Convection in an Annulus of Large Aspect Ratio

[+] Author and Article Information
L. S. Yao, B. B. Rogers

Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ 85287

J. Heat Transfer 111(3), 683-689 (Aug 01, 1989) (7 pages) doi:10.1115/1.3250737 History: Received January 05, 1988; Online October 20, 2009

Abstract

Mixed convection in an annulus of large aspect ratio is studied. At an aspect ratio of 100, the effect of wall curvature is minimal, and both the base flow and the stability characteristics approach those of a two-dimensional channel flow. The linear-stability results demonstrate that the fully developed flow is unstable in regions of practical interest in an appropriate parameter space. Consequently, commonly assumed steady parallel countercurrent flows in many idealized numerical and analytical studies are unlikely to be observed experimentally.

Copyright © 1989 by ASME
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