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Heat and Mass Transfer

, Volume 53, Issue 9, pp 2875–2884 | Cite as

Mixed convection heat transfer: an experimental study on Cu/heat transfer oil nanofluids inside annular tube

  • Ali Akbar Abbasian Arani
  • Hossein AberoumandEmail author
  • Amin Jafarimoghaddam
  • Sadegh Aberoumand
Original

Abstract

The heat transfer and flow characteristics of Cu–heat transfer oil nanofluid during mixed convection through horizontal annular tubes under uniform heat flux as boundary condition are investigated experimentally. Data were acquired at low Reynolds number ranged from about 26 to 252. The applied nanofluid prepared by Electrical Explosion of Wire technique with no nanoparticles agglomeration during nanofluid preparation process and experiments. Pure heat transfer oil and nanofluids with nanoparticles weight concentrations of 0.12, 0.36 and 0.72% were used as the working fluids. Based on these results, Effects of nanoparticles concentration, heat flux and free convection on the thermal field development are studied under buoyancy assisted flow condition for Grashof number, Richardson number between 2820 and 12,686, and 0.1–10, respectively. Results show that Nusselt number increases with an increase of nanoparticles weight concentrations from 0 to 0.72% under certain Richardson numbers.

Keywords

Heat Transfer Heat Transfer Coefficient Nusselt Number Mixed Convection Base Fluid 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Ali Akbar Abbasian Arani
    • 1
  • Hossein Aberoumand
    • 1
    Email author
  • Amin Jafarimoghaddam
    • 2
  • Sadegh Aberoumand
    • 3
  1. 1.Mechanical Engineering DepartmentUniversity of KashanKashanIran
  2. 2.Department of Aerospace EngineeringK. N. Toosi University of TechnologyTehranIran
  3. 3.Independent Researcher in Heat Transfer and Fluid MechanicsTehranIran

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