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Viscosity affected by nanoparticle aggregation in Al2O3-water nanofluids

Duan, Fei and Kwek, Dingtian and Crivoi, Alexandru (2011) Viscosity affected by nanoparticle aggregation in Al2O3-water nanofluids. Nanoscale Research Letters, 6 (1). pp. 1-5.

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Official URL: http://www.nanoscalereslett.com/content/6/1/248/ab...

Abstract

An investigation on viscosity was conducted 2 weeks after the Al2O3-water nanofluids having dispersants were prepared at the volume concentration of 1-5%. The shear stress was observed with a non-Newtonian behavior. On further ultrasonic agitation treatment, the nanofluids resumed as a Newtonian fluids. The relative viscosity increases as the volume concentrations increases. At 5% volume concentration, an increment was about 60% in the re-ultrasonication nanofluids in comparison with the base fluid. The microstructure analysis indicates that a higher nanoparticle aggregation had been observed in the nanofluids before re-ultrasonication.

Item Type:Article
Subjects:Physical Science > Nano objects
Material Science > Nanostructured materials
Material Science > Nanochemistry
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:10932
Deposited By:JNCASR
Deposited On:14 Sep 2011 05:41
Last Modified:14 Sep 2011 05:41

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