The Investigation of Effects of Temperature and Nanoparticles Volume Fraction on the Viscosity of Copper Oxide-ethylene Glycol Nanofluids

  • Mohammad Hemmat Esfe Faculty of Mechanical Engineering, Semnan University, Semnan, Iran

Abstract

In the present article, the effects of temperature and nanoparticles volume fraction on the viscosity of copper oxide-ethylene glycol nanofluid have been investigated experimentally. The experiments have been conducted in volume fractions of 0 to 1.5 % and temperatures from 27.5 to 50 °C. The shear stress computed by experimental values of viscosity and shear rate for volume fraction of 1% and in different temperatures show that this nanofluid has Newtonian behaviour. The experimental results reveal that in a given volume fraction when temperature increases, viscosity decreases, but relative viscosity varies. Also, in a specific temperature, nanofluid viscosity and relative viscosity increase when volume fraction increases. The maximum amount of increase in relative viscosity is 82.46% that occurs in volume fraction of 1.5% and temperature of 50 °C. Some models of computing nanofluid viscosity have been suggested. The greatest difference between the results obtained from these models and experimental results was down of 4 percent that shows that there is a very good agreement between experimental results and the results obtained from these models.

Keywords

dynamic viscosity, nanofluid, solid volume fraction, ethylene glycol
Published in Onlinefirst
16-03-2017
How to Cite
HEMMAT ESFE, Mohammad. The Investigation of Effects of Temperature and Nanoparticles Volume Fraction on the Viscosity of Copper Oxide-ethylene Glycol Nanofluids. Periodica Polytechnica Chemical Engineering, [S.l.], 2017. ISSN 1587-3765. Available at: <https://pp.bme.hu/ch/article/view/9741>. Date accessed: 24 nov. 2017. doi: https://doi.org/10.3311/PPch.9741.
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Articles