SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 32 ›› Issue (4): 27-38.DOI: 10.1016/j.cjche.2020.08.053

• Fluid Dynamics and Transport Phenomena • 上一篇    下一篇

Hydrothermal and entropy generation specifications of a hybrid ferronanofluid in microchannel heat sink embedded in CPUs

Amin Shahsavar1, Majid Jafari1, Pouyan Talebizadehsardari2,3, Davood Toghraie4   

  1. 1 Department of Mechanical Engineering, Kermanshah University of Technology, Kermanshah, Iran;
    2 Metamaterials for Mechanical, Biomechanical and Multiphysical Applications Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam;
    3 Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam;
    4 Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran
  • 收稿日期:2020-02-11 修回日期:2020-07-17 出版日期:2021-04-28 发布日期:2021-06-19
  • 通讯作者: Pouyan Talebizadehsardari

Hydrothermal and entropy generation specifications of a hybrid ferronanofluid in microchannel heat sink embedded in CPUs

Amin Shahsavar1, Majid Jafari1, Pouyan Talebizadehsardari2,3, Davood Toghraie4   

  1. 1 Department of Mechanical Engineering, Kermanshah University of Technology, Kermanshah, Iran;
    2 Metamaterials for Mechanical, Biomechanical and Multiphysical Applications Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam;
    3 Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam;
    4 Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran
  • Received:2020-02-11 Revised:2020-07-17 Online:2021-04-28 Published:2021-06-19
  • Contact: Pouyan Talebizadehsardari

摘要: The objective of this numerical work is to evaluate the first law and second law performances of a hybrid nanofluid flowing through a liquid-cooled microchannel heatsink. The water-based hybrid nanofluid includes the Fe3O4 and carbon nanotubes (CNTs) nanoparticles. The heatsink includes a microchannel configuration for the flow field to gain heat from a processor placed on the bottom of the heatsink. The effects of Fe3O4 concentration (φFe3O4), CNT concentration (φCNT) and Reynolds number (Re) on the convective heat transfer coefficient, CPU surface temperature, thermal resistance, pumping power, as well as the rate of entropy generation due to the heat transfer and fluid friction is examined. The results indicated higher values of convective heat transfer coefficient, pumping power, and frictional entropy generation rate for higher values of Re, φFe3O4 and φCNT. By increasing Re, φFe3O4 and φCNT, the CPU surface temperature and the thermal resistance decrease, and the temperature distribution at the CPU surface became more uniform. To achieve the maximum performance of the studied heatsink, applying the hybrid nanofluid with low φFe3O4 and φCNT was suggested, while the minimum entropy generation was achieved with the application of nanofluid with high φFe3O4 and φCNT.

关键词: Liquid-cooled heatsink, Hydrothermal aspects, Irreversibility, Hybrid nanofluid, Carbon nanotube, Fe3O4

Abstract: The objective of this numerical work is to evaluate the first law and second law performances of a hybrid nanofluid flowing through a liquid-cooled microchannel heatsink. The water-based hybrid nanofluid includes the Fe3O4 and carbon nanotubes (CNTs) nanoparticles. The heatsink includes a microchannel configuration for the flow field to gain heat from a processor placed on the bottom of the heatsink. The effects of Fe3O4 concentration (φFe3O4), CNT concentration (φCNT) and Reynolds number (Re) on the convective heat transfer coefficient, CPU surface temperature, thermal resistance, pumping power, as well as the rate of entropy generation due to the heat transfer and fluid friction is examined. The results indicated higher values of convective heat transfer coefficient, pumping power, and frictional entropy generation rate for higher values of Re, φFe3O4 and φCNT. By increasing Re, φFe3O4 and φCNT, the CPU surface temperature and the thermal resistance decrease, and the temperature distribution at the CPU surface became more uniform. To achieve the maximum performance of the studied heatsink, applying the hybrid nanofluid with low φFe3O4 and φCNT was suggested, while the minimum entropy generation was achieved with the application of nanofluid with high φFe3O4 and φCNT.

Key words: Liquid-cooled heatsink, Hydrothermal aspects, Irreversibility, Hybrid nanofluid, Carbon nanotube, Fe3O4