Baig Taha, Adil Amna, Manzoor S, Ebrahem M, Tariq Hussain Ahmed, Ali Hafiz Muhammad
Department of Mechanical Engineering, University of Engineering and Technology, Taxila, Pakistan.
Department of Mechanical Engineering, Air University Islamabad, Aerospace and Aviation Campus Kamra, Pakistan.
Nanotechnology. 2023 Aug 7;34(42). doi: 10.1088/1361-6528/ace82f.
To overcome the extensive heat generation inside the microprocessors nanofluids have gained importance because of their better thermophysical properties as compared with air and water. This work proposes a two-pronged strategy for thermal performance enhancement of mini channel heat sinks. Firstly, a novel dual flow slotted fin mini channel heat sink flow configuration is proposed. Secondly, a detailed numerical investigation is performed to assess heat transfer enhancement property of AlO-HO and TiO-HO nanofluids. Considering the first step, fin spacing, number of slots, slot thickness and slot angle are investigated in detail yielding to the selection of best structural parameters. Two slots per fin of 0.5 mm thickness at an angle of 45° is selected because it provides better thermal performance as compared with water. Further, numerical assessment of nano fluid behavior was carried out at volumetric concentrations of 0.005% and 0.01%. For the case of novel dual flow slotted fin mini channel heat sink, maximum numerical and experimental advantages in all targeted system properties is observed for AlO-HO nano fluid at volumetric concentration of 0.01%, as compared with water. AlO-HO nano fluid provides better thermal performance both numerically and experimentally as compared with TiO-HO nanofluids. Increment in the pressure drop is noted with increasing volumetric concentrations.
为了克服微处理器内部产生的大量热量，纳米流体因其与空气和水相比具有更好的热物理性质而变得重要。这项工作提出了一种双管齐下的策略来提高微通道散热器的热性能。首先，提出了一种新颖的双流开槽翅片微通道散热器流动配置。其次，进行了详细的数值研究，以评估AlO-HO和TiO-HO纳米流体的传热增强特性。考虑到第一步，详细研究了翅片间距、槽数、槽厚度和槽角度，从而选择最佳结构参数。选择每片翅片有两个厚度为0.5毫米、角度为45°的槽，因为与水相比，它具有更好的热性能。此外，在体积浓度为0.005%和0.01%的情况下对纳米流体行为进行了数值评估。对于新型双流开槽翅片微通道散热器的情况，与水相比，在体积浓度为0.01%的AlO-HO纳米流体中，在所有目标系统特性方面观察到最大的数值和实验优势。与TiO-HO纳米流体相比，AlO-HO纳米流体在数值和实验上均提供了更好的热性能。随着体积浓度的增加，压降也会增加。
