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URN etd-0823111-092918 Statistics This thesis had been viewed 1955 times. Download 636 times. Author Li-Wei Zhang) Author's Email Address No Public. Department Mechanical Engineering Year 2010 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 105 Title Performance Analysis of a Heat Sink with Gas Diffusion Region Keyword heat sink thermal resistance flow diffusion passage flow diffusion passage thermal resistance heat sink Abstract This study is to investigate the cooling enhancement of an electronic cooling system due to the installation of a flow diffusion passage located between the uniform flow inlet and the heat sink.
There are three advantages can be observed from this simple design. Since the design of this study can change the uniform inlet flow into nonuniform flow distribution through the flow diffusion passage, the first advantage is that this design can increase the cooling effect. The second advantage of this design is obtained from entrained flow occurrence near the downstream outlet region that can increase the mass flow rate accumulated around the heat sink and carry away more heat out of heat sink. The third advantage is that a longer flow diffusion passage will
smoothly induce the flow impact over the solid rectangular fin array and hence that can even decrease the pressure loss of this cooling system.
In the present study, 5% to 10% of thermal resistance ratio can be decreased through the specification and the arranged range appeared in this study.
Advisor Committee Hong-Sen Kou - advisor
Ji-Jen Lee - advisor
Cheng-Fang Chen - co-chair
Sheam-Chyun Lin - co-chair
Files Date of Defense 2011-07-27 Date of Submission 2011-08-23