We report measurements of the thermal conductivity of aqueous suspensions of aluminum oxide nanoparticles with nominal diameters of , , and and at volume concentrations up to 10%. Potential complications in the pulsed transient hot-wire technique for characterizing nanofluids are examined, which motivate the development of a microhot strip setup with a small thermal time constant. The average particle size is monitored for samples subjected to different durations of sonication and the thermal conductivity is determined at two different temperatures for each of the samples. The present data do not reveal any anomalous enhancement in the thermal conductivity previously reported for comparable nanofluids. The concentration dependence of the thermal conductivity can be explained using the conventional effective medium model with a physically reasonable set of parameters.
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e-mail: just@seas.ucla.edu
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September 2008
This article was originally published in
Journal of Heat Transfer
Research Papers
Experimental Study of Heat Conduction in Aqueous Suspensions of Aluminum Oxide Nanoparticles
Y. Sungtaek Ju,
Y. Sungtaek Ju
Mechanical and Aerospace Engineering Department,
e-mail: just@seas.ucla.edu
University of California
, Los Angeles, CA 90095
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Jichul Kim,
Jichul Kim
Mechanical and Aerospace Engineering Department,
University of California
, Los Angeles, CA 90095
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Ming-Tsung Hung
Ming-Tsung Hung
Mechanical and Aerospace Engineering Department,
University of California
, Los Angeles, CA 90095
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Y. Sungtaek Ju
Mechanical and Aerospace Engineering Department,
University of California
, Los Angeles, CA 90095e-mail: just@seas.ucla.edu
Jichul Kim
Mechanical and Aerospace Engineering Department,
University of California
, Los Angeles, CA 90095
Ming-Tsung Hung
Mechanical and Aerospace Engineering Department,
University of California
, Los Angeles, CA 90095J. Heat Transfer. Sep 2008, 130(9): 092403 (6 pages)
Published Online: July 10, 2008
Article history
Received:
June 6, 2007
Revised:
January 3, 2008
Published:
July 10, 2008
Citation
Ju, Y. S., Kim, J., and Hung, M. (July 10, 2008). "Experimental Study of Heat Conduction in Aqueous Suspensions of Aluminum Oxide Nanoparticles." ASME. J. Heat Transfer. September 2008; 130(9): 092403. https://doi.org/10.1115/1.2945886
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