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Enhancement of Turbulent Convective Heat Transfer using a Microparticle Multiphase Flow

Author

Listed:
  • Tao Wang

    (Institute of Process Equipment and Control Engineering, Zhejiang University of Technology, Hangzhou 310032, China
    Institute of Mechanical Engineering, Quzhou University, Quzhou 324000, China)

  • Zengliang Gao

    (Institute of Process Equipment and Control Engineering, Zhejiang University of Technology, Hangzhou 310032, China)

  • Weiya Jin

    (Institute of Process Equipment and Control Engineering, Zhejiang University of Technology, Hangzhou 310032, China)

Abstract

The turbulent heat transfer enhancement of microfluid as a heat transfer medium in a tube was investigated. Within the Reynolds number ranging from 7000 to 23,000, heat transfer, friction loss and thermal performance characteristics of graphite, Al 2 O 3 and CuO microfluid with the particle volume fraction of 0.25%–1.0% and particle size of 5 μm have been respectively tested. The results showed that the thermal performance of microfluids was better than water. In addition, the graphite microfluid had the best turbulent convective heat transfer effect among several microfluids. To further investigate the effect of graphite particle size on thermal performance, the heat transfer characteristics of the graphite microfluid with the size of 1 μm was also tested. The results showed that the thermal performance of the particle size of 1 μm was better than that of 5 μm. Within the investigated range, the maximum value of the thermal performance of graphite microfluid was found at a 1.0% volume fraction, a Reynolds number around 7500 and a size of 1 μm. In addition, the simulation results showed that the increase of equivalent thermal conductivity of the microfluid and the turbulent kinetic energy near the tube wall, by adding the microparticles, caused the enhancement of heat transfer; therefore, the microfluid can be potentially used to enhance turbulent convective heat transfer.

Suggested Citation

  • Tao Wang & Zengliang Gao & Weiya Jin, 2020. "Enhancement of Turbulent Convective Heat Transfer using a Microparticle Multiphase Flow," Energies, MDPI, vol. 13(5), pages 1-16, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:5:p:1282-:d:330830
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    References listed on IDEAS

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    1. Behrouz Takabi & Hossein Shokouhmand, 2015. "Effects ofAl2O3–Cu/water hybrid nanofluid on heat transfer and flow characteristics in turbulent regime," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 26(04), pages 1-25.
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