Experimental evaluation of dynamic viscosity of ZnO–MWCNTs/engine oil hybrid nanolubricant based on changes in temperature and concentration

被引：0
作者：
Marjan Goodarzi
Davood Toghraie
Mahdi Reiszadeh
Masoud Afrand
机构：
[1] Ton Duc Thang University,Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environment and Labour Safety
[2] Islamic Azad University,Department of Mechanical Engineering, Khomeinishahr Branch
[3] Islamic Azad University,Department of Mechanical Engineering, Shahreza Branch
[4] Islamic Azad University,Department of Mechanical Engineering, Najafabad Branch
来源：
Journal of Thermal Analysis and Calorimetry | 2019年 / 136卷
关键词：
Dynamic viscosity; Engine oil; Temperatures; Solid volume fractions; Experimental;
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摘要：
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 °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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页码：513 / 525
页数：12
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