Investigations on convective heat transfer enhancement in circular tube radiator using Al2O3 and CuO nanofluids

[+] Author and Article Information
Sobin Alosious

Research Scholar, Department of Applied Mechanics, Indian Institute of Technology, Madras

Sarath S R

Department of Mechanical Engineering, College of Engineering, Trivandrum

Anjan R Nair

Department of Mechanical Engineering, College of Engineering, Trivandrum

K. Krishnakumar

Department of Mechanical Engineering, College of Engineering, Trivandrum

1Corresponding author.

ASME doi:10.1115/1.4039924 History: Received July 21, 2017; Revised March 06, 2018


In this study, forced convective heat transfer inside a circular tube automobile radiator is experimentally and numerically investigated. The investigation is carried out using Al2O3 and CuO nanofluids with water as their base fluid. A single radiator circular tube with the same dimensions is numerically modeled. Numerical model is validated using the experimental study results. In the experimental study, Al2O3 and CuO nanofluids of 0.05% volume concentrations (f) were recirculated through the radiator for the Reynolds number (Re) between 260 to 1560. The numerical investigation is conducted for the nanoparticle volume concentration from 0 to 6.0% and 260 < Re < 1560. The investigation shows an enhancement of convective heat transfer coefficient (h) with the increase in nanoparticle volume concentration and with the Reynolds number. A maximum enhancement of 38% and 33% were found for Al2O3 and CuO nanofluids of f = 1% and Re = 1560. For the same cooling load of the radiator, the pumping power can be reduced by 8% and 10%, when Al2O3 and CuO nanofluids (f = 0.8%) were used. However, the addition of nanofluid results in an enhancement of density and viscosity along with a reduction in specific heat capacity. Hence the selection of nanoparticle volume concentration should consider its effect on the thermophysical properties. It is found that the preferred concentration is between 0.4% to 0.8% for both Al2O3 and CuO nanofluids. In our investigations, it is observed that the convective heat transfer performance of Al2O3 nanofluid is better than the CuO nanofluid.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.






Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In