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Thermo-hydraulic performance in ceramic-made microchannel heat sinks with an optimum fin geometry
Case Studies in Thermal Engineering ( IF 6.8 ) Pub Date : 2022-06-26 , DOI: 10.1016/j.csite.2022.102230
Yan Cao , Mohamed Abbas , M.A. El-Shorbagy , Khaled A. Gepreel , M. Dahari , Van Vang Le , Mohamed Fathy Badran , Phat Huy Huynh , Makatar Wae-hayee

Efficient heat rejection from modern microelectronic equipment plays a substantial role in increasing the functionality and longevity of these products. Microchannel heat sinks (MCHSs) are one of the liquid-cooling technologies, and it is needed to increase their heat transfer performance to acquire higher cooling capacity. In the current numerical study, two distinct strategies are suggested to ameliorate the heat transfer behavior of the MCHSs. First, straight-slot fins with different aspect ratios (b/a = 1.5, 2, 2.5, 3, 4, and 5) are added to the microchannels. The heat transfer and pressure drop properties in the finned-heat sink are analyzed numerically. After investigating straight-slot fins and selecting the optimum model, the heat sink's material is changed from alumina to Aluminum nitride (AlN) and Beryllium oxide (BeO). The impact of utilizing these two advanced ceramics on the thermo-hydraulic performance of the MCHS is examined. According to the obtained results, the MCHS with longer straight-slot fins (b/a = 5) indicated higher thermal performance values at all investigated Reynolds numbers. Changing the optimum model's material from alumina to AlN and BeO ceramics, the MCHS's thermal performance was enhanced by about 3.72 and 4.22 times (at the Reynolds number of 300), respectively.



中文翻译:

具有最佳翅片几何形状的陶瓷微通道散热器的热工水力性能

现代微电子设备的高效散热在提高这些产品的功能性和使用寿命方面发挥着重要作用。微通道散热器(MCHS)是液体冷却技术之一,需要提高其传热性能以获得更高的冷却能力。在当前的数值研究中,提出了两种不同的策略来改善 MCHS 的传热行为。首先,将具有不同纵横比(b/a = 1.5、2、2.5、3、4 和 5)的直槽翅片添加到微通道中。对翅片散热器的传热和压降特性进行了数值分析。在研究了直槽翅片并选择了最佳型号后,散热器的材料由氧化铝改为氮化铝(AlN)和氧化铍(BeO)。研究了使用这两种先进陶瓷对 MCHS 的热工水力性能的影响。根据获得的结果,具有较长直槽翅片 (b/a = 5) 的 MCHS 在所有研究的雷诺数下都显示出更高的热性能值。将最佳模型的材料从氧化铝更改为 AlN 和 BeO 陶瓷,MCHS 的热性能分别提高了约 3.72 倍和 4.22 倍(在雷诺数为 300 时)。

更新日期:2022-06-30
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