Numerical Study of Laminar Natural Convection From a Plate to its Cylindrical Enclosure

[+] Author and Article Information
M. M. Elshamy, M. N. Ozisik

Mechanical and Aerospace Engineering Department, North Carolina State University, Raleigh, NC 27695

J. Sol. Energy Eng 113(3), 194-199 (Aug 01, 1991) (6 pages) doi:10.1115/1.2930492 History: Received November 08, 1990; Revised February 04, 1991; Online June 06, 2008


The steady-state laminar natural convection for air bounded by a hot plate and a cold cylindrical enclosure has been studied numerically for the case of cold isothermal cylinder and hot isothermal plate. A correlation is presented for the average Nusselt number over the range of Rayleigh number from 105 to 106 for different values of the width-aspect ratio Sw and thickness aspect-ratio St of the plate. It is found that the average Nusselt number increases with increasing Sw and Rayleigh number. A two-cell pattern is observed for Sw =1.5 and less. The effect of Sw on the average Nusselt number is found to be stronger than that of St .

Copyright © 1991 by The American Society of Mechanical Engineers
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