碩士 / 國立成功大學 / 機械工程學系 / 102 / The present study applies the inverse method and computational fluid dynamics commercial software with the experimental data to investigate the heat transfer characteristics of the heat sink in a closed enclosure. The inverse method with finite difference method in conjunction with the least squares scheme is used to determine the average heat transfer coefficient on the fin. Due to the non-uniform distribution of the heat transfer coefficient, the plate-fin is divided into several sub-fin regions before performing the inverse scheme. The average heat transfer coefficient on each sub-fin region is assumed to be unknown. The inverse method is then applied to obtain the temperature distribution and average heat transfer coefficient. The results will compare with the empirical correlation. The present study also applies commercial software with appropriate flow model and grid points and the experimental temperature data to obtain fin temperatures at measurement locations. The temperature and velocity distribution in the closed enclosure are obtained. The average heat transfer coefficient on the fins increases with increasing fin spacing or Rayleigh number, and decreases with increasing fin height. The effects of the flow model and grid points on the results can not be ignored.
| Identifer | oai:union.ndltd.org:TW/102NCKU5489058 |
| Date | January 2014 |
| Creators | Chung-HouLai, 賴仲豪 |
| Contributors | Han-Taw Chen, 陳寒濤 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 83 |
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