Publication Cover
Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 43, 2003 - Issue 1
83
Views
11
CrossRef citations to date
0
Altmetric
Original Articles

Optimization of Natural Convection Heat Transfer from a Cylinder with High Conductivity Fins

Pages 65-82 | Published online: 30 Nov 2010
 

Abstract

The problem of laminar natural convection from a horizontal cylinder with one or more high conductivity fins on its outer surface was investigated numerically. The aim was to optimize the number, size, and location of the fin(s) for maximum natural convection heat convection, i.e., Nusselt number, over a wide range of Rayleigh numbers. The percentage improvement in heat transfer per fin(s) unit length, i.e., cost efficiency, was also studied. For all combinations of Rayleigh number, number of fin(s), and fin(s) location, the maximum Nusselt number occurred when using the longest fin(s). Placing two long fins, per each half of the cylinder for a total of four fins for a complete cylinder, one at the lower and the other at the top parts of the cylinder, resulted in the maximum Nusselt number over the entire range of Rayleigh numbers studied (10 3 -10 6 ). The exact tangential location of these two fins was Rayleigh number dependent. The highest fin cost efficiency was achieved by using one or two optimally placed fin(s). The configuration for the highest fin cost efficiencydid not always coincide with that of the maximum Nusselt number.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.