Hernandez Battez, A., Viesca, 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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Nanofluids, a term proposed by Choi in 1995 , 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.  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 and Technology|
|Deposited By:||Unnamed user with email symplectic@symplectic|
|Deposited On:||24 Feb 2014 12:33|
|Last Modified:||10 Sep 2014 14:57|
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