Thermal-hydraulic performance and multi-objective design optimization of a microchannel heat sink with hollow twisted tapes

IF 2.6 3区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Heat and Fluid Flow Pub Date : 2025-08-02 DOI:10.1016/j.ijheatfluidflow.2025.109993

Yang Yuan , Wen Liu , Pingnan Huang , Nan Wu , Chaozhong Li

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引用次数: 0

Abstract

The increasing power density and miniaturization of modern electronics require highly efficient thermal management solutions. Although twisted tapes are commonly used to improve heat transfer in macro-scale devices, their use in microscale devices like microchannel heat sinks (MHS) has not been thoroughly investigated. A microchannel heat sink (MHS) with hollow twisted tapes was designed in this paper, and its thermal–hydraulic performance was investigated by numerical simulation method. The results showed that compared to the thermal–hydraulic performance of traditional twisted tape, the hollow twisted tape achieves an 80 % decrease in pressure drop with a 19 % reduction in Nu. Response surface analysis on the designed MHS indicate that reduction of tape pitch and hollow core diameter significantly increases Nu and f, while a decrease in thickness and length leads to a decrease in Nu and f. To maximize the Nusselt number (Nu) and minimize the friction factor (f), multi-objective design optimization of the twisted tape was conducted through the standard second-order response surface method and multi-objective genetic algorithm (MOGA). At a Re = 500, the optimized structure results in a 19 % increase in Nu, a 24 % decrease in f, and a 27 % increase in Figure of Merit (FoM). These results are helpful for the design of microchannel heat sinks in industry.

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空心扭带微通道散热器的热工性能及多目标设计优化

不断增加的功率密度和现代电子产品的小型化需要高效的热管理解决方案。虽然扭曲带通常用于改善宏观器件的传热，但其在微通道散热器（MHS）等微尺度器件中的应用尚未得到深入研究。设计了一种带空心扭带的微通道散热器，并采用数值模拟方法对其热工性能进行了研究。结果表明，与传统扭带相比，空心扭带的压降降低80%，Nu降低19%。对设计的MHS进行响应面分析表明，减小胶带间距和空心芯直径会显著增加Nu和f，减小胶带厚度和长度会导致Nu和f减小。为了使努selt数（Nu）最大化，摩擦因数(f)最小化，采用标准二阶响应面法和多目标遗传算法（MOGA）对扭曲胶带进行多目标设计优化。在Re = 500时，优化后的结构使Nu增加19%，f减少24%，FoM增加27%。这些结果对工业上微通道散热器的设计有一定的指导意义。

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来源期刊

International Journal of Heat and Fluid Flow 工程技术-工程：机械

CiteScore

5.00

自引率

7.70%

发文量

131

审稿时长

33 days

期刊介绍： The International Journal of Heat and Fluid Flow welcomes high-quality original contributions on experimental, computational, and physical aspects of convective heat transfer and fluid dynamics relevant to engineering or the environment, including multiphase and microscale flows. Papers reporting the application of these disciplines to design and development, with emphasis on new technological fields, are also welcomed. Some of these new fields include microscale electronic and mechanical systems; medical and biological systems; and thermal and flow control in both the internal and external environment.