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Experimental Investigation of Free Convection Heat Transfer from Horizontal Cylinder to Nanofluids

Author

Listed:
  • Dorota Sawicka

    (Faculty of Nature and Engineering, J.R. Mayer–Institute for Energy Engineering, City University of Applied Sciences Bremen, Neustadtswall 30, 28199 Bremen, Germany)

  • Janusz T. Cieśliński

    (Faculty of Mechanical and Ship Technology, Institute of Energy, Gdańsk University of Technology, Narutowicza 11/12, 80233 Gdansk, Poland)

  • Slawomir Smolen

    (Faculty of Nature and Engineering, J.R. Mayer–Institute for Energy Engineering, City University of Applied Sciences Bremen, Neustadtswall 30, 28199 Bremen, Germany)

Abstract

The results of free convection heat transfer investigation from a horizontal, uniformly heated tube immersed in a nanofluid are presented. Experiments were performed with five base fluids, i.e., ethylene glycol (EG), distilled water (W) and the mixtures of EG and water with the ratios of 60/40, 50/50, 40/60 by volume, so the Rayleigh (Ra) number range was 3 × 10 4 ≤ Ra ≤ 1.3 × 10 6 and the Prandtl (Pr) number varied from 4.4 to 176. Alumina (Al 2 O 3 ) nanoparticles were tested at the mass concentrations of 0.01, 0.1 and 1%. Enhancement as well as deterioration of heat transfer performance compared to the base fluids were detected depending on the composition of the nanofluid. Based on the experimental results obtained, a correlation equation that describes the dependence of the average Nusselt (Nu) number on the Ra number, Pr number and concentration of nanoparticles is proposed.

Suggested Citation

  • Dorota Sawicka & Janusz T. Cieśliński & Slawomir Smolen, 2021. "Experimental Investigation of Free Convection Heat Transfer from Horizontal Cylinder to Nanofluids," Energies, MDPI, vol. 14(10), pages 1-14, May.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:10:p:2909-:d:556801
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    References listed on IDEAS

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    1. Hussein, Adnan M. & Sharma, K.V. & Bakar, R.A. & Kadirgama, K., 2014. "A review of forced convection heat transfer enhancement and hydrodynamic characteristics of a nanofluid," Renewable and Sustainable Energy Reviews, Elsevier, vol. 29(C), pages 734-743.
    2. Haddad, Zoubida & Oztop, Hakan F. & Abu-Nada, Eiyad & Mataoui, Amina, 2012. "A review on natural convective heat transfer of nanofluids," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(7), pages 5363-5378.
    3. Sajid, Muhammad Usman & Ali, Hafiz Muhammad, 2019. "Recent advances in application of nanofluids in heat transfer devices: A critical review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 103(C), pages 556-592.
    4. Janusz T. Cieśliński & Slawomir Smolen & Dorota Sawicka, 2021. "Free Convection Heat Transfer from Horizontal Cylinders," Energies, MDPI, vol. 14(3), pages 1-22, January.
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    Cited by:

    1. Luke Jurgen Briffa & Charise Cutajar & Tonio Sant & Daniel Buhagiar, 2022. "Numerical Modeling of the Thermal Behavior of Subsea Hydro-Pneumatic Energy Storage Accumulators Using Air and CO 2," Energies, MDPI, vol. 15(22), pages 1-20, November.
    2. Florent Bunjaku & Risto V. Filkoski, 2023. "Optimisation of Thermal and Geometric Parameters of Cylindrical Fins during Natural Convection," Energies, MDPI, vol. 16(4), pages 1-14, February.
    3. Janusz T. Cieśliński & Slawomir Smolen & Dorota Sawicka, 2021. "Effect of Temperature and Nanoparticle Concentration on Free Convective Heat Transfer of Nanofluids," Energies, MDPI, vol. 14(12), pages 1-19, June.

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