Experimental investigation of the effects of temperature and nanoparticles volume fraction on the viscosity of Newtonian hybrid nanofluid

Subject Areas : Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering

Ashkan Afshari ¹ , Mohammad Eftekhari Yazdi ²

1 - Department of Mechanical Engineering, Tehran Markazi Branch, Islamic Azad University, Tehran, 13185-768, Iran
2 - Department of Mechanical Engineering, Tehran markazi Branch, Islamic Azad University, Tehran, Iran

Received: 2018-01-17 Accepted : 2018-02-25 Published : 2018-04-14

Keywords: Viscosity, Multi-walled Carbon Nanotubes, Nanofluids, Non-Newtonian behavior, Aluminum oxide,

Abstract :

In this paper, an experimental study has been conducted on the rheological behavior of Water (80%) and Ethylene-glycol (20%) in presence of Al2O3-MWCNTs hybrid nanomaterials. For this purpose, nanofluid samples were prepared by suspending the nanomaterials in a mixture of water and EG with solid volume fractions of 0.0625%, 0.125%, 0.25% and 0.5% Viscosity measurements were performed at various shear rates and in the temperatures range of 25 to 50⁰C. Experimental data showed that all hybrid nanofluid samples had Newtonian behavior. also Results showed that nanofluid viscosity decreased with increasing temperature and augmented with increasing the volume fraction. Eventually, a new accurate correlation was developed to assist the calculation of the viscosity of the Al2O3-MWCNTs/water-EG at different temperatures and volume fractions

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