Experimental Investigation of the Thermophysical Properties of TiO2/Propylene Glycol–Water Nanofluids for Heat-Transfer Applications
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Nanofluids have been prepared by dispersing TiO2 nanoparticles in 70:30% (by weight) water–propylene glycol mixture. The thermal conductivity and viscosity were found experimentally at various temperatures with the volume concentrations 0.1–0.8%. The results indicate that the thermal conductivity of the nanofluids increases with the volume concentration and temperature. Similarly, the viscosity of the nanofluids increases with the volume concentration but decreases with increase in the temperature. Correlations have been proposed for estimating the thermal conductivity and viscosity of the nanofluids. The potential heat transfer benefits of their use in laminar and turbulent flow conditions has been explained.
KeywordsTiO2 nanofluids thermal conductivity enhancement viscosity density volume concentration
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- 2.U. S. Choi, D. M. France, and B. D. Knodel, Impact of advanced fluids on costs of district cooling systems, in: Proc. 83rd Ann. Int. District Heating and Cooling Association Conf., Danvers, Washington, D. C. (1992), pp. 343–359.Google Scholar
- 5.S. U. S. Choi and J. A. Eastman, Enhancing thermal conductivity of fluids with nanoparticles, in: Proc. ASME Int. Mechanical Engineering Congress and Exposition, San Francisco (1995), pp. 99–105.Google Scholar
- 19.S. A. Ibrahim and S. Sreekantan, Effect of pH on TiO2 nanoparticles via sol-gel method, in: Proc. ICXRI, 9–10 June, 2010, Aseania Resort Langkawi, Malaysia (2010), pp. 84–87.Google Scholar
- 20.K. D. Kihm, Fundamendals of energy transport in nanofluids, Annual Report, 1–42 (2003).Google Scholar
- 24.Z. Haddad, C. Abid, O. Rahil, O. Margeat, W. Dachraoui, and A. Mataoui, Is it important to measure the volumetric mass density of nanofluids? Math. Phys. Electrical Comput. Eng., 8, 310–313 (2014).Google Scholar
- 27.H. C. Brinkman, The viscosity of concentrated suspensions and solutions, Chem. Phys., 20, 571–580 (1952).Google Scholar
- 29.N. Jamshidi, M. Farhadi, D. D. Ganji, and K. Sedighi, Experimental investigation on the viscosity of nanofluids, Eng. Transact. B, 25, 201–209 (2012).Google Scholar
- 31.M. Jalal, H. Meisami, and M. Pouyagohar, Experimental study of CuO/water nanofluid effect on convective heat transfer of a heat sink, Sci. Res., 13, 606–611 (2013).Google Scholar
- 33.R. E. Simons, Comparing heat transfer rates of liquid coolants using the Mouromtseff number, Electron. Cool., 12, No. 2 (2006).Google Scholar