Study on Optimal Design of Liquid Cooling Uniform Temperature Plate Embedded with Hierarchical Vein Structure

doi:10.3901/JME.2022.22.426

Abstract

Abstract: Inspired by the leaf veins of the heat-resistant plants, by incorporating the topology optimization design technique with the hierarchical liquid-cooling channels, an optimal design methodology for the liquid-cooled heat sink is proposed. First, the main branch channel layout is generated by maximizing the heat exchange and minimizing the flow resistance based on topology optimization. Secondly, the local features of the populus euphratica leaf are extracted and they are integrated into the obtained channel layout to generate the sub-branch channels. A newly defined “structure pixel density” can be used to describe the porosity of the channel. This porosity can affect the global flow and thermal performances of the heat sink. The results show that the hierarchical cooling channel has a lower power dissipation while it can provide a better temperature uniformity, and the optimal matching of the main and sub-branches can be observed. By further studying the distribution pattern of the leaf veins, it can be observed that the cooling channels and the leaf veins share some similarities in appearance. This work not only provides a new insight into the design of liquid-cooled heat sink, but also reveals the positive effect of the leaf vein patterns on their heat and mass transfer. Finally, the flow and thermal performances of the heat sinks are investigated experimentally. The experimental results show a good correspondence with the numerical results. Hence, the effectiveness of the proposed design method is validated.

Key words: liquid cooling uniform temperature plate, topology optimization, veins of heat-resisting plants, hierarchical vein structure, experimental investigation

CLC Number:

TG156

MENG Fan-zhen, DING Xiao-hong, LI Hao, XIONG Min. Study on Optimal Design of Liquid Cooling Uniform Temperature Plate Embedded with Hierarchical Vein Structure[J]. Journal of Mechanical Engineering, 2022, 58(22): 426-437.

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