Journal
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume 153, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2020.119575
Keywords
Double minichannel heat sink; Inlet-outlet arrangement; Through-hole; Nusselt number; Thermal resistance; Pressure drop
Categories
Funding
- Shaanxi Natural Science Foundation [2019JM-071]
- 111 Project of China [B14042, B18041]
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To decrease the substrate temperature gradient of a traditional single serpentine mini-channel heat sink, we present a novel double serpentine heat sink and perform experimental and numerical tests by employee ANSYS FLUENT (version 15) code to trade off the flow and thermal performance of the heat sink. The effects of three inlet-outlet arrangements, the through-hole numbers and the diameter of through-hole on the cooling capacity are compared and analyzed. It can be found that the introduction of interleaved inlet-outlet outperform provides much better uniform substrate temperature, meanwhile, the pressure drop can be reduced by up to 43%, and the average Nusselt number can be raised by up to 26% through punching holes on the channel wall at Q(v) = 0.159 L/min. It is also suggested that the double serpentine heat sink using more holes exhibits much better thermal performance attributed to the distinct alleviation of the maximum substrate temperature. (C) 2020 Elsevier Ltd. All rights reserved.
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