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Rheological behaviour of nanofluids containing tube / rod-like nanoparticles
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Chen, Haisheng, Ding, Yulong and Lapkin, Alexei (2009) Rheological behaviour of nanofluids containing tube / rod-like nanoparticles. Powder Technology, Vol.194 (No.1-2). pp. 132-141. doi:10.1016/j.powtec.2009.03.038 ISSN 0032-5910.
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Official URL: http://dx.doi.org/10.1016/j.powtec.2009.03.038
Abstract
Experiments are carried out on the rheological behaviour of ethylene glycol (EG) based titanate nanotubes (TNT) nanofluids containing 0.5, 1.0, 2.0, 4.0 and 8.0 wt.% TNT at 20–60 °C. The results show a very strong shear thinning behaviour of the TNT nanofluids and big influences of particle concentration and temperature on the zero shear viscosity (ZSV) and high shear viscosity (HSV), for which the conventional form of Brenner & Condiff Equation fails to predict. Theoretical analyses show that these experimentally observed phenomena can be well interpreted by the conventional colloid theory if particle shape and aggregation effects are taken into account and different relative importance of the Brownian diffusion and convection at different shear rates. It is suggested that nanofluids containing tube / rod-like nanoparticles with effective aspect ratio (ra) and effective volume fraction (φa) can be classified into dilute nanofluids with 0 < φa < 1/ra2, semi-dilute nanofluids with 1/ra2 < φa < 1/ra, semi-concentrated and concentrated nanofluids with 1/ra < φa.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry T Technology > TP Chemical technology |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
Library of Congress Subject Headings (LCSH): | Nanofluids, Rheology, Titanates, Nanotubes, Ethylene glycol | ||||
Journal or Publication Title: | Powder Technology | ||||
Publisher: | Elsevier BV | ||||
ISSN: | 0032-5910 | ||||
Official Date: | 25 August 2009 | ||||
Dates: |
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Volume: | Vol.194 | ||||
Number: | No.1-2 | ||||
Number of Pages: | 10 | ||||
Page Range: | pp. 132-141 | ||||
DOI: | 10.1016/j.powtec.2009.03.038 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC), K.C. Wong Foundation | ||||
Grant number: | F023014 (EPSRC), EP/E000665 (EPSRC), EP/F000464 (EPSRC) |
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