碩士 / 逢甲大學 / 機械工程學所 / 100 / Fin is one of the main cooling devices and is widely applied in electronic components, heat exchangers, and high technique products. The objective of this research is to investigate the natural convection behavior of a two dimensional heated horizontal circular cylinder with longitudinal fins by using the FLUENT software. The effects of fin thickness and length on the heat transfer behavior are studied in this research.
The main purpose of this research is to study the effects of fin thickness and length on the average heat transfer coefficient, overall heat transfer rate, and local Nusselt number distribution. It is observed that increasing the fin thickness, which increases the contact area between the fin and the tube, will have better heat transfer effect. Increasing the fin length, which increases the heat transfer area and expands the heat affecting area in fluid, will enhance the heat transfer rate as well. It is also observed that the local Nusselt number is pretty low and without obvious change for about 80% fin length from the root, but it increases drastically at the 20% fin length near the fin tip. Therefore, the average heat transfer coefficient decreases with increasing the fin length.
| Identifer | oai:union.ndltd.org:TW/100FCU05489005 |
| Date | January 2012 |
| Creators | Chia-wen Huang, 黃嘉文 |
| Contributors | Minter Cheng, 成銘德 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 47 |
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