Experimental Study of Laminar Natural Convection in Cells With Various Convex and Concave Bottoms

[+] Author and Article Information
W. M. Lewandowski, M. J. Khubeiz

Department of Chemical Engineering, Technical University of Gdansk, Gdansk, Poland

J. Heat Transfer 114(1), 94-98 (Feb 01, 1992) (5 pages) doi:10.1115/1.2911273 History: Received June 13, 1990; Revised March 18, 1991; Online May 23, 2008


Heat transfer and free convective motion in limited space from the bottoms of different hemispherical convex or concave shapes have been studied experimentally. The ratio of the diameter of the hemisphere (d) to the diameter of the bottom (D) (0 < d/D < 1) has been tested for a range of Rayleigh numbers (105 < Ra <107 ). In comparison with a flat bottom (d/D = 0), about 40 percent inhibition or about 50 percent intensification depending on the bottom configuration (d/D) have been observed. The mechanism of the phenomenon based on dead space, local overheating, and shape influence effects has been proposed.

Copyright © 1992 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In