期刊
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
卷 136, 期 2, 页码 513-525出版社
SPRINGER
DOI: 10.1007/s10973-018-7707-8
关键词
Dynamic viscosity; Engine oil; Temperatures; Solid volume fractions; Experimental
In this work, an experimental investigation on the effects of temperature and concentration of nanoparticles on the viscosity of ZnO-MWCNTs/engine oil (SAE 10W40) hybrid nanolubricant is presented. The experiments were repeated at volume fractions of 0.05%, 0.1%, 0.2%, 0.4%, 0.6%, and 0.8%, temperature range of 5-55 degrees C, and shear rates from 666.5 to 13,330 s(-1). The viscosity of hybrid nanolubricant was measured using the Brookfield digital viscometer (CAP2000). We found that the nanofluid has a Newtonian behavior at all volume fractions and temperatures. Also, by increasing the volume fraction of nanoparticles and nanotubes at a constant temperature the nanofluid viscosity is increased. Nanofluid viscosity decreases with increasing the temperature at a constant volume fraction.
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