Heat transfer characteristics of thermally and hydrodynamically developing flows in multi-layer mini-channel heat sinks
Heat transfer characteristics of thermally and hydrodynamically developing flows in multi-layer mini-channel heat sinks
复制标题
多层微通道散热器中热力和流体动力流动的传热特性
DOI：
10.1016/j.ijheatmasstransfer.2023.124052
复制
发表时间：
2023
影响因子：
5.2
通讯作者：
Nemati H
中科院分区：
文献类型：
--
作者：
Nemati H
在本研究中，提出一种新型的空气冷却散热器，它由几层微型通道组成。在这种设计中，水力直径小于传统类型的散热器，例如板翅式散热器，因此，可实现的传热速率更高。为了预测这种散热器的冷却性能，提出了一种创新的分析方法，从该方法的结果是由大量的数值模拟的同时发展的流动，热和流体动力学，内的矩形通道的散热器的补充。分析方法的结果进行了比较，对二维和三维模拟和良好的协议被发现，而从模拟，相关性提出了在这些流量的努塞尔数。最后，所提出的散热器的性能进行了比较，板翅式散热器。这种比较表明，在后者中的熵产生比前者高出约27%，并表明所提出的散热器设计的一个有前途的优势。
In this study, a novel type of air-cooled heat sink is proposed, which consists of several layers of mini-channels. In this design, the hydraulic diameter is smaller than in conventional types of heat sinks, such as plate-fin heat sinks, and consequently, the achievable heat transfer rates are higher. To predict the cooling performance of this heat sink, an innovative analytical method is proposed, results from which are complemented by an extensive number of numerical simulations of the simultaneously developing flows, thermally and hydrodynamically, inside a rectangular channel of the heat sink. The results of the analytical method are compared against two- and three-dimensional simulations and good agreement is found, while from the simulations, correlations are proposed for the Nusselt number in these flows. Finally, the performance of the proposed heat sink is compared to a plate-fin heat sink. This comparison reveals that entropy generation in the latter is around 27% higher than in the former, and suggests a promising advantage of the proposed heat sink design.