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Numerical investigation of microchannel heat sinks with different inlets and outlets based on topology optimization

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  • Xia, Yang
  • Chen, Li
  • Luo, Jiwang
  • Tao, Wenquan

Abstract

Topology optimization can generate better structures of microchannel with improved cooling performance. In this paper, microchannel heat sinks with five different inlet and outlet structure combinations are optimized using bi-objective topology optimization based on the density method. The layouts of channels are optimized to minimize the power dissipation and total heat generation at the same time. The results show that the straight line inlet and outlet with extension areas (SE) can reduce 20%-50% power dissipation when realizing the same heat transfer performance compared with traditional one channel inlet and one channel outlet (OC). Effects of Reynolds number, the ratio of solid and fluid thermal conductivity and the dimensionless heat generation coefficient in fluid domains are also investigated. The simple channels can be obtained with higher ratio of solid and fluid thermal conductivity and/or higher dimensionless heat generation coefficient in fluid domains. With optimization further considered in the inlet and outlet regions, better overall performance can be obtained. Finally, the 2D optimized structures are further validated by three-dimensional numerical simulation. It is found that the optimized design can realize 53.28% increment of Nusselt number with 40.89% reduction in pressure drop compared with traditional microchannel heat sinks.

Suggested Citation

  • Xia, Yang & Chen, Li & Luo, Jiwang & Tao, Wenquan, 2023. "Numerical investigation of microchannel heat sinks with different inlets and outlets based on topology optimization," Applied Energy, Elsevier, vol. 330(PA).
    • Handle: RePEc:eee:appene:v:330:y:2023:i:pa:s0306261922015926
    DOI: 10.1016/j.apenergy.2022.120335
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    References listed on IDEAS

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    1. Muhammad Asim & Muhammad Hanzla Tahir & Ammara Kanwal & Fahid Riaz & Muhammad Amjad & Aamna Khalid & Muhammad Mujtaba Abbas & Ashfaq Ahmad & Mohammad Abul Kalam, 2023. "Effects of Varying Volume Fractions of SiO 2 and Al 2 O 3 on the Performance of Concentrated Photovoltaic System," Sustainability, MDPI, vol. 15(10), pages 1-22, May.
    2. Wang, Hui & Wang, Zelin & Qu, Zhiguo & Zhang, Jianfei, 2023. "Deep-learning accelerating topology optimization of three-dimensional coolant channels for flow and heat transfer in a proton exchange membrane fuel cell," Applied Energy, Elsevier, vol. 352(C).

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