Experimental Study on the Thermal Conductivity and Viscosity of Transformer Oil -Based Nanofluid Containing ZnO Nanoparticles
Publish place: Journal of Heat and Mass Transfer Research، Vol: 7، Issue: 1
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JHMTR-7-1_007
تاریخ نمایه سازی: 24 شهریور 1403
Abstract:
This study investigates the effect of ZnO nanoparticles to transformer oil on the thermal conductivity and dynamic viscosity. The consequence of the temperature and nanofluid concentration as an important parameters have been explored on the thermal conductivity and viscosity of the samples. The results indicated that the thermal conductivity of the nanofluid was higher than that of the pure transformer oil at the temperature of ۲۵°C. Also, a rise in the nanoparticle concentration of transformer oil increased the thermal conductivity of nanofluid. Besides, the thermal conductivity at the volume fractions of ۰.۰۵% and ۱% increased by approximately ۴.۶۱% and ۱۱.۵۳%, respectively. The dynamic viscosity reached the highest level at maximum volume fraction in all temperatures. In addition, an increase in the temperature reduced the dynamic viscosity of both the pure transformer oil and the nano-oil. At a given temperature, a rise in the volume fraction of ZnO nanoparticles enhanced the dynamic viscosity. Moreover, to predict the dynamic viscosity of nanofluid, a new correlation has been presented as a function of temperature and volume fraction with R-Sq=۰.۹۹۱۳.
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Authors
Mojtaba Parvar
Faculty of Mechanical Engineering, Semnan University, Semnan, Iran
Syfolah Saedodin
Faculty of Mechanical Engineering, Semnan University, Iran
Seyed Hadi Rostamian
School of engineering,Damghan university, Damghan, Iran
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