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http://dx.doi.org/10.3795/KSME-B.2010.34.2.179

Thermal Optimization of a Straight Fin Heat Sink with Bypass Flow  

Kim, Jin-Wook (LG Electronics Display R&D Lab.)
Kim, Sang-Hoon (LG Electronics Display R&D Lab.)
Kim, Joong-Nyon (LG Electronics Display R&D Lab.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.34, no.2, 2010 , pp. 179-184 More about this Journal
Abstract
This experimental study investigated the effect of tip clearance and bypass flow on the cooling performance of a straight fin heat sink. Both the horizontal and vertical directions of the bypass flow were studied by using a mass flow controller and test sections. The thermal resistance of a heat sink was obtained to elucidate the response of the cooling performance to tip clearance and bypass flow. The thermal resistance of a straight fin heat sink gradually increases with increasing tip clearance. A flow guide unit was employed to reduce the bypass flow. An optimal distance from the leading edge of the heat sink to the flow guide unit was found for the fixed volume flow rate. The contribution of the flow guide unit to the thermal performance of a heat sink increases with increasing volume flow rate.
Keywords
Heat Sink; Thermal Resistance; Bypass; Tip Clearance; Flow Guide Unit;
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