Chen, Haisheng, Ding, Yulong, Lapkin, Alexei and Fan, Xiaolei. (2009) Rheological behaviour of ethylene glycol-titanate nanotube nanofluids. Journal of Nanoparticle Research, Vol.11 (No.6). pp. 1513-1520. ISSN 1388-0764

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Abstract

Experimental work has been performed on the rheological behaviour of ethylene glycol based nanofluids containing titanate nanotubes over 20–60 °C and a particle mass concentration of 0–8%. It is found that the nanofluids show shear-thinning behaviour particularly at particle concentrations in excess of ~2%. Temperature imposes a very strong effect on the rheological behaviour of the nanofluids with higher temperatures giving stronger shear thinning. For a given particle concentration, there exists a certain shear rate below which the viscosity increases with increasing temperature, whereas the reverse occurs above such a shear rate. The normalised high-shear viscosity with respect to the base liquid viscosity, however, is independent of temperature. Further analyses suggest that the temperature effects are due to the shear-dependence of the relative contributions to the viscosity of the Brownian diffusion and convection. The analyses also suggest that a combination of particle aggregation and particle shape effects is the mechanism for the observed high-shear rheological behaviour, which is also supported by the thermal conductivity measurements and analyses.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology
Divisions:	Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH):	Rheology, Nanotubes, Nanofluids, Ethylene glycol, Titanates, Thermal conductivity
Journal or Publication Title:	Journal of Nanoparticle Research
Publisher:	Springer Netherlands
ISSN:	1388-0764
Date:	August 2009
Volume:	Vol.11
Number:	No.6
Number of Pages:	8
Page Range:	pp. 1513-1520
Identification Number:	10.1007/s11051-009-9599-9
Status:	Not Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Engineering and Physical Sciences Research Council (EPSRC)
Grant number:	EP/E00041X/1 (EPSRC), EP/F015380/1 (EPSRC)
URI:	http://wrap.warwick.ac.uk/id/eprint/37182

Data sourced from Thomson Reuters' Web of Knowledge

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