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Byon, Chan
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Investigation of natural convection heat transfer around a radial heat sink with a perforated ring

Author(s)
Li, BinJeon, SoraByon, Chan
Issued Date
2016-06
DOI
10.1016/j.ijheatmasstransfer.2016.02.058
URI
https://scholarworks.unist.ac.kr/handle/201301/21452
Fulltext
http://www.sciencedirect.com/science/article/pii/S0017931015303835
Citation
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.97, pp.705 - 711
Abstract
Numerical studies were performed on natural convection heat transfer from radial heat sinks with perforated ring. The effects of perforation number (0-6), perforation diameter (0-3 mm), and perforation length (1.5-6 mm), and orientations angle (0-180 degrees) on the thermal performance were investigated. The results show that radial heat sinks with a perforated ring obviously have better thermal performance than that with imperforated ring. Upwardly oriented radial heat sinks have the best thermal performance while sideward oriented radial heat sinks yield worst thermal performance. The geometric parameters of perforation is shown to affect the thermal performance of heat sink significantly at relatively higher heat transfer rate, especially for upward and sideward orientations. The thermal resistance of the radial heat sink with optimized perforated ring was shown to be less than that of imperforated ring by 17%, while reducing the mass of ring by up to 37%. This can be attributed to the unhindered natural convective flow through the perforation.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
ISSN
0017-9310
Keyword (Author)
Radial heat sinkConcentric ringPerforation
Keyword
LED LIGHT-BULBSTHERMAL PERFORMANCECONCENTRIC RING

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