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http://dx.doi.org/10.3795/KSME-B.2011.35.3.293

Flow Characteristics of Al2O3 Nanofluids with Nanoparticles of Various Shapes  

Hwang, Kyo-Sik (School of Aerospace and Mechanical Engineering, Korea Aerospace Univ.)
Ha, Hyo-Jun (School of Aerospace and Mechanical Engineering, Korea Aerospace Univ.)
Jang, Seok-Pil (School of Aerospace and Mechanical Engineering, Korea Aerospace Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.35, no.3, 2011 , pp. 293-299 More about this Journal
Abstract
To study the flow characteristics of water-based $Al_2O_3$ nanofluids according to the shape of the nanoparticles, we measure the pressure drop in a fully developed laminar flow regime. Water-based $Al_2O_3$ nanofluids of 0.3 Vol.% with sphere-, rod-, platelet-, and brick-shaped nanoparticles are manufactured by the two-step method. Zeta potential is measured to examine the suspension and dispersion characteristics, and TEM image is considered to confirm the shape characteristics of the nanoparticles. The experimental results show that the pressure drop of $Al_2O_3$ nanofluids depends on the shape of the nanoparticles although the nanofluids has same volume fraction of nanoparticles. This is explained by the surface area per unit mass of the nanoparticles and the size of the nanoparticles suspended in the base fluids.
Keywords
Nanofluids; Nanoparticles Shape; Pressure Drop;
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