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Stability of nanofluids in quiescent and shear flow fields

Witharana, S, Chen, H and Ding, Y (2011) Stability of nanofluids in quiescent and shear flow fields. Nanoscale Research Letters, 6 (1). ISSN 1931-7573

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Abstract

An experimental study was conducted to investigate the structural stability of ethylene glycol-based titanium dioxide nanoparticle suspensions (nanofluids) prepared by two-step method. The effects of particle concentration, fluid temperature, shear rate and shear duration were examined. Particle size and thermal conductivity measurements in quiescent state indicated the existence of aggregates and that they were stable in temperatures up to 60°C. Shear stability tests suggested that the structure of nanoparticle aggregates was stable in a shear interval of 500-3000 s-1 measured over a temperature range of 20-60°C. These findings show directions to resolve controversies surrounding the underlying mechanisms of thermal conduction and convective heat transfer of nanofluids.

Item Type: Article
Copyright, Publisher and Additional Information: © 2011 Witharana et al; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License(http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Process, Environmental and Materials Engineering (Leeds)
Depositing User: Symplectic Publications
Date Deposited: 12 Sep 2011 10:24
Last Modified: 10 Jun 2014 08:58
Published Version: http://dx.doi.org/10.1186/1556-276X-6-231
Status: Published
Publisher: Springer Open
Identification Number: 10.1186/1556-276X-6-231
URI: http://eprints.whiterose.ac.uk/id/eprint/43250

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