Khetib Yacine, Abo-Dief Hala M, Alanazi Abdullah K, Sajadi S Mohammad, Sharifpur Mohsen, Meyer Josua P
Mechanical Engineering Department, Faculty of Engineering, King Abdulaziz University, Jeddah 80204, Saudi Arabia.
Center Excellence of Renewable Energy and Power, King Abdulaziz University, Jeddah 80204, Saudi Arabia.
Micromachines (Basel). 2021 Sep 30;12(10):1192. doi: 10.3390/mi12101192.
In this paper, a common and widely used micro-heat sink (H/S) was redesigned and simulated using computational fluid dynamics methods. This H/S has a large number of microchannels in which the walls are wavy (wavy microchannel heat sink: WMCHS). To improve cooling, two (Al2O3 and CuO) water-based nanofluids (NFs) were used as cooling fluids, and their performance was compared. For this purpose, studies were carried out at three Reynolds numbers (Re) of 500, 1000, and 1500 when the volume percent () of the nanoparticles (NPs) was increased to 2%. The mixture two-phase (T-P) model was utilized to simulate the NFs. Results showed that using the designed WMCHS compared to the common H/S reduces the average and maximum temperatures (T-Max) up to 2 °C. Moreover, using the Al2O3 NF is more suitable in terms of WMCHS temperature uniformity as well as its thermal resistance compared to the CuO NF. Increasing the is desirable in terms of temperature, but it enhances the pumping power (PP). Besides, the Figure of Merit (FOM) was investigated, and it was found that the value is greater at a higher volume percentage.
在本文中，使用计算流体动力学方法对一种常见且广泛使用的微型散热器（H/S）进行了重新设计和模拟。这种H/S有大量微通道，其壁面呈波浪状（波浪形微通道散热器：WMCHS）。为了改善冷却效果，使用了两种（Al2O3和CuO）水基纳米流体（NFs）作为冷却液，并对它们的性能进行了比较。为此，在纳米颗粒（NPs）的体积百分比（）增加到2%时，在500、1000和1500这三个雷诺数（Re）下进行了研究。利用混合两相（T-P）模型对纳米流体进行模拟。结果表明，与普通H/S相比，使用设计的WMCHS可将平均温度和最高温度（T-Max）降低多达2°C。此外，就WMCHS的温度均匀性及其热阻而言，与CuO纳米流体相比，使用Al2O3纳米流体更合适。就温度而言，增加是可取的，但它会提高泵浦功率（PP）。此外，还研究了品质因数（FOM），发现体积百分比越高，该值越大。
