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Journal of Nanomaterials
Volume 2015 (2015), Article ID 256479, 6 pages
http://dx.doi.org/10.1155/2015/256479
Research Article

Classical Behavior of Alumina (Al2O3) Nanofluids in Antifrogen N with Experimental Evidence

1Department of Materials and Nano Physics, KTH Royal Institute of Technology, 16440 Kista Stockholm, Sweden
2Department of Materials and Environmental Chemistry, Stockholm University, 106 91 Stockholm, Sweden
3Faculty of Science & Technology, University of Twente, 7500 AE Enschede Twente, Netherlands

Received 13 February 2015; Revised 19 May 2015; Accepted 22 June 2015

Academic Editor: Cristina Flox

Copyright © 2015 M. Saleemi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A nanofluid is a suspension containing nanoparticles in conventional heat transfer fluids. This paper reports on an investigation of alumina (Al2O3) nanoparticles in Antifrogen N, also called AFN, which is a popular antifreeze coolant consisting primarily of ethylene glycol and other additives to impede corrosion. The base carrier fluid is 50% by weight of water and 50% by weight of AFN. We systematically measured the nanomaterials and heat transfer data of nanofluids for four different size particles, namely, 20, 40, 150, and 250 nm alumina particles. The pH of all the nanofluids is adjusted to have a stable dispersion. The material characterizations include SEM and DLS particle measurements. We measured thermal conductivity, viscosity, and heat transfer coefficient in developing flow of the nanofluids. We observed that these nanofluids behave as any other classical fluids in thermally developing flow and classical heat transfer correlations can be used to completely describe the characteristics of these nanofluids.