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Numerical Simulation of Flow and Heat Transfer Characteristics in Non-Closed Ring-Shaped Micro-Pin-Fin Arrays

Author

Listed:
  • Ming Chen

    (Energy Research Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

  • Can Ji

    (Energy Research Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

  • Zhigang Liu

    (Energy Research Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

  • Naihua Wang

    (Institute of Thermal Science and Technology, Shandong University, Jinan 250061, China)

Abstract

In this study, flow and heat transfer characteristics in novel non-closed 3/4 ring-shaped micro-pin-fin arrays with in-line and staggered layouts were investigated numerically. The flow distribution, wake structure, vorticity field and pressure drop were examined in detail, and convective heat transfer features were explored. Results show that vortex pairs appeared earlier in the ring-shaped micro-pin-fin array compared with the traditional circular devices. Pressure drop across the microchannel varied with layout of the fins, while little difference in pressure drop was observed between ring-shaped and circular fins of the same layouts, with the maximum difference being 1.43%. The staggered ring-shaped array was found to outperform the in-line array and the circular arrays in convective heat transfer. A maximum increase of 21.34% in heat transfer coefficient was observed in the ring-shaped micro-pin-fin array in comparison with the circular micro-pin-fin array. The overall thermal-hydraulic performance of the microstructure was evaluated, and the staggered ring-shaped array with a fin height of 0.5 mm exhibited the best performance among the configurations studied.

Suggested Citation

  • Ming Chen & Can Ji & Zhigang Liu & Naihua Wang, 2023. "Numerical Simulation of Flow and Heat Transfer Characteristics in Non-Closed Ring-Shaped Micro-Pin-Fin Arrays," Energies, MDPI, vol. 16(8), pages 1-17, April.
  • Handle: RePEc:gam:jeners:v:16:y:2023:i:8:p:3481-:d:1124965
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    References listed on IDEAS

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    1. Hao Yu & Tongling Li & Xiaoxin Zeng & Tianbiao He & Ning Mao, 2022. "A Critical Review on Geometric Improvements for Heat Transfer Augmentation of Microchannels," Energies, MDPI, vol. 15(24), pages 1-45, December.
    2. Sherief Reda, 2017. "3D integration advances computing," Nature, Nature, vol. 547(7661), pages 38-39, July.
    3. Zhiqiang Xin & Xiangyu Kong & Jing Chen, 2022. "Enhancement of Heat Transfer in a Microchannel via Passive and Active Control of a Jet Issued from the Circular Cylinder," Energies, MDPI, vol. 15(21), pages 1-23, November.
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    Cited by:

    1. Shi, Xuhang & Li, Chunzhe & Yang, Zhenning & Xu, Jie & Song, Jintao & Wang, Fuqiang & Shuai, Yong & Zhang, Wenjing, 2024. "Egg-tray-inspired concave foam structure on pore-scale space radiation regulation for enhancing photo-thermal-chemical synergistic conversion," Energy, Elsevier, vol. 297(C).

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