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

Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering

مقاله 6، دوره 10، شماره 3، آبان 2017، صفحه 67-74   

نوع مقاله: English

نویسندگان

Ashkan Afshari¹؛ Mohammad Eftekhari Yazdi^{* 2}

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

²Department of Mechanical Engineering, Tehran markazi Branch, Islamic Azad University, Tehran, Iran

چکیده

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

کلیدواژه‌ها

Viscosity؛ Non-Newtonian behavior؛ Nanofluids؛ Aluminum oxide؛ Multi-walled Carbon Nanotubes

مراجع

[1] P.K. Namburu, D.P. Kulkarni, D. Misra, D.K. Das. "Viscosity of copper oxide nanoparticles dispersed in ethylene glycol and water mixture," Experimental Thermal and Fluid Science, Vol. 32, No. 2, 397-402, 2007.

[2] M. Afrand, D. Toghraie and B. Ruhani, "Effects of temperature and nanoparticles concentration on rheological behavior of Fe3O4–Ag/EG hybrid nanofluid: an experimental study," Experimental Thermal and Fluid Science, 77, pp. 38-44, 2016.

[3]  M. Baratpour, A. Karimipour,  M. Afrand  and S. Wongwises, "Effects of temperature and concentration on the viscosity of nanofluids made of single-wall carbon nanotubes in ethylene glycol.," INT COMMUN HEAT MASS., pp. 74:108-13, 2016.

[4]  H. Eshgarf, M. Afrand, "An experimental  study on rheological behavior of non-Newtonian hybrid nano-coolant for application in cooling and heating systems," Experimental Thermal and Fluid Science, Vol. 76, pp. 221-227, 2016.

[5] M. Hemmat Esfe, "The Investigation of Effects of Temperature and Nanoparticles Volume Fraction on the Viscosity of Copper Oxide-Ethylene-glycol Nanofluids," Periodica Polytechnica. Chemical Engineering, Vol. 62, No. 1, pp. 43, 2018.

[6] M. Afrand, D. Toghraie, B. Ruhani. "Effects of temperature and nanoparticles concentration on rheological behavior of Fe3O4–Ag/EG hybrid nanofluid: An experimental study," Experimental Thermal and Fluid Science, Vol. 77, pp. 38-44, 2016.

[7] M.B. Moghaddam, E.K. Goharshadi, M.H. Entezari, P. Nancarrow, Preparation, "characterization and rheological properties of grapheme–glycerol nanofluids," Chemical Engineering Journal, Vol. 231, pp. 365–372, 2013.