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In relation to this article, we declare that there is no conflict of interest.
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Received November 12, 2021
Accepted March 28, 2022
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Multi-objective optimization of microchannel heat sink with Cantor fractal structure based on Pareto genetic algorithm

Faculty of Mechanical Engineering and Automation, Liaoning University of Technology, Jinzhou, Liaoning 121001, China 1College of Transportation, Ludong University, Yantai, Shandong 264025, China 2Northern Heavy Industries Group Co, Ltd, Shen Yang, Liaoning, 110141, China
Korean Journal of Chemical Engineering, August 2022, 39(8), 2069-2079(11), 10.1007/s11814-022-1126-z
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Abstract

Microchannel heat sinks have been widely used in high-density packaged electronic device cooling technology. We combined the cantor fractal structure with the microchannel heat sink to design a new type of microchannel structure. Combining fractal structure with microchannel heat sink is one of the cutting-edge technologies of heat transfer to solve the heat dissipation problem of high heat flux electronic equipment. We chose the width-to-height ratio of the microchannel inlet (a/b), the width-to-height ratio of the Cantor fractal baffle (B/h) and the ratio of the microchannel inlet width and the distance between each group of baffles (a/λ) as design variables, and the optimization objective was to make the global thermal resistance and pump work minimum. First, the pressure drops, temperature, and velocity of the microchannel heat sink were analyzed. Then, to consider the fluid heat transfer and pressure drop comprehensively, the enhanced heat transfer factor PEC was used to evaluate the comprehensive heat transfer performance of the microchannel. The final optimized structure PEC values were all greater than 1. In the Reynolds number (Re) range of 100-500, its enhanced heat transfer factor PEC is 1.56-1.79, which indicates that the heat transfer effect of the optimized microchannel heat sink is greatly enhanced than that of the conventional microchannel.

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