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ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561
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NUMERICAL ANALYSIS OF THE THERMAL PERFORMANCE OF A NOVEL DOUBLE-LAYERED HEAT SINK WITH STAGGERED PIN FINS
Краткое описание
A new design of a heat sink, called double-layered staggered pin-fin heat sink (DL-SPFHS), is proposed in this work, and its thermal performance is investigated numerically. The thermal performance of DL-SPFHS was compared with the commonly used double-layered microchannel heat sink (DL-MCHS) at the same volume flow rate and overall geometric dimensions. The maximum wall temperature on the bottom wall of DL-SPFHS is 13.2 K lower than that of DL-MCHS. Furthermore, the effects of two geometric parameters, namely, the pin-fin dimension ratio of the fin length to fin width and pin-fin spacing ratio of the gap length to fin width, on thermal resistance and pressure drop were analyzed. With the increase in the pin-fin dimension ratio, the thermal resistance of DL-SPFHS decreased first and then increased, and with the pin-fin dimension ratio of 3, DL-SPFHS achieved the lowest thermal resistance which is 5.3% lower than that of the DL-SPFHS with the ratio of 1. However, the thermal resistance of DL-SPFHS increased linearly with increase of the pin-fin spacing ratio. The total pressure drop decreased significantly with increase in either the pin-fin dimension ratio or pin-fin spacing ratio.
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