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Viscosity and tribology of copper oxide nanofluids.

Hernandez Battez, A., Viesca Rodriguez, J.L., Gonzalez, R. and Fernandez, J.E., 2008. Viscosity and tribology of copper oxide nanofluids. In: STLE/ASME International Joint Tribology Conference, 20--22 October 2008, Miami, FL, USA.

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Abstract

Nanofluids, a term proposed by Choi in 1995 [1], are composites consisting of solid nanoparticles with sizes varying generally from 1 to 100 nm dispersed in a liquid. Numerous nanoparticles used as oil additives have been investigated in recent years [2-7]. Results show that they deposit on the rubbing surface and improve the tribological properties of the base oil, displaying good friction and wear reduction characteristics even at concentrations below 2%wt. Although the viscosity of the nanofluids is a property of crucial importance for film forming, and hence friction and wear reduction, which are characteristic of lubricants, only Hwang et al. [8] have studied thermal characteristics, kinematic viscosity and tribological properties of nanofluids simultaneously. In this paper, we present measurements of dynamic viscosity of nanofluids formed by copper oxide nanoparticles dispersed in a polyalphaolefin, for temperatures and concentrations varying from 20 to 60ºC and 0.5 to 2% wt., respectively. Dependence of the nanofluid viscosity to the solid fraction and temperature was compared with existing models and its influence on lubrication was also analysed.

Item Type:Conference or Workshop Item (Paper)
Group:Faculty of Science & Technology
ID Code:21063
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:24 Feb 2014 12:33
Last Modified:14 Nov 2018 10:12

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