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Thermal-hydraulic investigation on micro heat sinks with ribbed pin-fin arrays and single heating input: parametrical study

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Abstract

The electronic devices are facing the challenge of high heat flux. To improve the thermal and hydraulic performance of micro heat sinks with ribbed pin-fins and single heating input, the geometrical parameters, including shapes, arrangements, width and height, are numerically investigated. The results show that the micro heat sinks with arc ribbed pin-fins exhibit the best comprehensive performance comparing with triangle and rectangle ribbed pin-fins. Meanwhile, even for the single heating input, the staggered ribs arrangement exhibits better comprehensive performance than that of the in-line ribs arrangement the same Reynolds number. Moreover, the average Nu number increases first and then decreases with the increase in the rib width. At Re = 1342, the average Nusselt number of Dp/D0 = 1/2 can reach up 44.3, which is 1.8 times of Dp/D0 = 3/2. Increasing the Hp/H0 plays a positive effect on improving thermal performance but with higher pressure loss. At higher Hp/H0, increasing Hp/H0 does not show obvious effect on reduction total thermal resistance under the same pump power. To better balance the thermal resistance and pressure drop, the value of Dp/D0 and Hp/H0 should be chosen properly.

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Acknowledgements

The authors gratefully acknowledge financial support from Joint Fund of the National Natural Science Foundation of China and China Aerospace Science and Technology Corporation on Advanced Manufacturing Technology for Aerospace Industry (U1737113), Graduate Research and Innovation Foundation of Chongqing (CYB20019), Fundamental Research Funds for the Central Universities (2019CDYGYB022) and Natural Science Foundation of Chongqing (cstc2019jcyj-msxmX0223).

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  1. Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing, 400030, China

    Ziqiang He, Yunfei Yan & Li Zhang

  2. School of Energy and Power Engineering, Chongqing University, Chongqing, 400030, China

    Ziqiang He, Yunfei Yan & Li Zhang

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Correspondence to Yunfei Yan.

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He, Z., Yan, Y. & Zhang, L. Thermal-hydraulic investigation on micro heat sinks with ribbed pin-fin arrays and single heating input: parametrical study. J Therm Anal Calorim 147, 6489–6505 (2022). https://doi.org/10.1007/s10973-021-10977-y

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