年間 6 号発行
ISSN 印刷: 1940-2503
ISSN オンライン: 1940-2554
Indexed in
LAMINAR FLOW AND HEAT-TRANSFER CHARACTERISTICS OF MICROCHANNEL HEAT SINKS COMBINED WITH RIBS AND CAVITIES FOR ELECTRONIC COOLING
要約
Two microchannel heat sinks (MCHS) combined with ribs and cavities, with in-line and staggered arrangements, are investigated numerically. Laminar fluid flow, heat transfer, and the effects of geometric parameters on the Nusselt number and friction factor are examined. The overall performance evaluation criterion (PEC) for MCHS is used, based on thermal and hydraulic characteristics. Obtained results show that the combination of ribs and cavities can significantly prevent temperature increases along the flow direction and contributes to heat-transfer enhancement due to the interruption and redevelopment of thermal boundary layers. Additionally, the average Nusselt numbers of the two heat sinks are nearly equivalent. However, the average friction factor of the staggered arrangement is lower than that of the in-line arrangement. Thus, the PEC of the staggered arrangement is higher than that of the in-line arrangement under the same conditions. In particular, the best PEC is obtained to be Re = 320 for the two heat sinks.
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