An experimental investigation on the effect of a perforated fin on free convection heat transfer from a confined horizontal cylinder. Issue 3 (20th February 2013)

• Record Type: Journal Article
• Authors: Rezaei, Amir Abbas; Ziabasharhagh, Masoud
• Is Part Of: Heat transfer - Asian research. Volume 42:Issue 3(2013)
• Page Start: 197
• Page End: 211
• Publication Date: 2013-02-20
• Subjects: Heat -- Transmission -- Periodicals; Electronic journals; 621.4022
• DOI: 10.1002/htj.21041
• Languages: English
• ISSNs: 1099-2871

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Natural convection heat transfer from an isothermal horizontal fin attached to a cylinder, confined between two adiabatic walls of constant height is investigated by the Mach–Zehnder interferometry technique. This study is focused on the effect of a perforated fin attached to the bottom of a cylinder while the vertical position of the cylinder (<italic>Y</italic> ) changes between two walls with a constant distance of <italic>W</italic> measuring 1.5 times the cylinder diameter. The cylinder's average Nusselt numbers are determined for three ratios of vertical position to its diameter, <italic>Y</italic> /<italic>D</italic> = 0.5, 1.5, 2, and 3. The Rayleigh number ranges from 4.5 × 10³ to 1.2 × 10⁴. The distance between the walls is chosen to be 1.5 <italic>D</italic>, that is, an optimum distance at which the Nusselt number is maximum. The effect of the perforated fin on free convection heat transfer is investigated and compared with other works. Results show outstanding enhancement in heat transfer, with a minimum result of 40% and maximum of 90%. © 2013 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley Online Library (wileyonlinelibrary.com/journal/htj). DOI 10.1002/htj.21041</p> </abstract>