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Shear Stability and Thermophysical Properties of Titania Nanofluids

Witharana, S, Chen, H, Ding, Y, Musina, Z and Jin, Y (2011) Shear Stability and Thermophysical Properties of Titania Nanofluids. In: Information and Automation for Sustainability (ICIAFs),. Information and Automation for Sustainability (ICIAFs), 2010 5th International Conference on, Colombo. IEEE , 555 - 559 . ISBN 978-1-4244-8549-9


An experimental study was carried out to investigate the structural stability of ethylene glycol based titanium dioxide nanoparticle suspensions (nanofluids) prepared with two-step method. Effect of particle concentration, fluid temperature, shear rate and shear duration were investigated. It was found that the temperature resolved thermal conductivity of nano fluid-, followed die trend of the base fluids, Thermal conductivity enhancement was dependent on particle loading but nearly independent of temperature. Shear stability tests suggested that the structure of nanoparticle aggregates was stable at a shear rate of 500-300 1/s over a temperatures range of 20-60°C. These findings shed some light to the interpretation of controversies surrounding the mechanisms of thermal conduction and convective heat transfer enhancement of nanofluids.

Item Type: Proceedings Paper
Keywords: nanofluids, titania, thermopysical, rheology, shear, thermal conductivity, nanoparticles, aggregation, stability
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Chemical & Process Engineering (Leeds)
Depositing User: Symplectic Publications
Date Deposited: 13 Sep 2011 11:00
Last Modified: 15 Sep 2014 03:53
Published Version: http://dx.doi.org/10.1109/ICIAFS.2010.5715723
Status: Published
Publisher: IEEE
Identification Number: 10.1109/ICIAFS.2010.5715723
URI: http://eprints.whiterose.ac.uk/id/eprint/43269

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