Title page for etd-1117116-232044


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URN etd-1117116-232044
Author Yu-Cheng Hsieh
Author's Email Address No Public.
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Department Mechanical and Electro-Mechanical Engineering
Year 2016
Semester 2
Degree Master
Type of Document
Language English
Title Heat transfer Enhancement in Microchannels
with Roughened Surfaces
Date of Defense 2017-07-26
Page Count 88
Keyword
  • heat transfer enhancement
  • square micro-pin fin
  • microstructured roughened surface
  • micro-channels
  • Abstract The main task of study to two parts: Adding to the micro-structure in micro-channels investigates geometry of the micro-pin fins, and making use of the periodic arrangement in parallel .With this to results, one can effectively enhance the heat transfer rate of system, and find a suitable roughened surface to enhance the heat transfer rate. The present study shows that the addition of microstructured roughened surface in microchannels can improve the heat transfer performance, in which the heat transfer rate superiority can be found in a descending order such as square, elliptical, circular, hexagonal and triangular structural block. It is found that the heat transfer enhancement of the square micro pin fin is up to 7-8 %. Furthermore, it was also found that the heat transfer enhancement of the microchannel in the low Reynolds number of the study is mainly due to heat conduction. Therefore, the effect of the convective enhancement due to the present surface roughness / block seems insignificant.
    Advisory Committee
  • Ching-Jenq Ho - chair
  • Chao-Guang Chen - co-chair
  • Shou-Shing Hsieh - advisor
  • Chi-Hui Chien - advisor
  • Files
  • etd-1117116-232044.pdf
  • Indicate in-campus at 3 year and off-campus access at 4 year.
    Date of Submission 2017-08-15

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