Experimental Measurement of Dynamic Viscosity of CeO2-EG at Different Concentrations and Temperatures and Proposing a New Correlation
الموضوعات : فصلنامه شبیه سازی و تحلیل تکنولوژی های نوین در مهندسی مکانیک
محمد اکبری
1
(استادیار، گروه مهندسی مکانیک، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد ، ایران)
امیر حسین سعیدی
2
(کارشناس ارشد، گروه مهندسی مکانیک، واحد خمینی شهر، دانشگاه آزاد اسلامی، خمینی شهر، ایران)
الکلمات المفتاحية: Nano-Fluid Dynamic Viscosity CeO2 EG,
ملخص المقالة :
Nanofluid is made through the nanoscale particles suspended in a fluid base and Nanotechnology is a new attempt in thermal science investigations. As a result of huge investment in developed countries on nanotechnology, research on thermal properties of nano-fluids is of particular interest. Due to the usage of nanotechnology to reduce energy consumptions, in this project CeO2 with EG is used to make the nanofluid.For stabilization of nanofluid ultrasonic wave is used and viscosity is measured by a digital viscometer. In this paper, the effects of temperature and volume fraction on the viscosity of nanofluids are considered.This study indicated that the viscosity decreases in all concentrations when temperature increased. Also it increases when the volume fraction of nanoparticles increases. Results show that viscosity changes related to temperature at higher concentrations are higher. After considering the rheological properties and getting accurate test results, it is possible to obtain a relation to predict the nanofluid viscosity based on the temperature and volume fraction with high accuracy
[1] Choi S. U. S., Enhancing thermal conductivity of fluids with nanoparticles, Developments Applications of Non-Newtonian Flows, vol. 66, 1995, pp. 99-105.
[2] Masuda A. E, Teramae H, Hishinuma K. N., Alteration of thermal conductivity and viscosity of liquid by dispersing ultra-fine particles (dispersion of c-Al2O3, SiO2 and TiO2 ultra fine particles), Netsu Bussei (japan), vol. 4, 1993, pp. 227-233.
[3] Wang X, Choi, S. U. S., Thermal conductivity of nanoparticlefluid mixture, Thermophysics Heat Transfer, vol.13, 1999, pp. 474-480.
[4] Praveen D. P. K, Namburu K, Debasmita M. D. K, Das S. K, Choi S. U.S, Pradeep W., Viscosity of copper oxide nanoparticles dispersed in ethylene glycol and water mixture, Thermal Fluid Science, vol.32, 2007, pp. 397-402.
[5] Yiamsawas O. M. T, Selim Dalkilic A, Kaewnai S, Wongwises S., Experimental studies on the viscosity of TiO2 and Al2O3 nanoparticles suspended in a mixture of ethylene glycol and water for high temperature applications, Applied Energy, vol. 111, 2013, pp. 40-45.
[6] Saedodin S, Hemmat Esfe M., An experimental investigation and new correlation of viscositybof ZnO–EG nanofluid at various temperatures and different solid volume fractions, Thermal and Fluid science, vol. 55, 2014, pp. 82-98.
[7] Hemmat Esfe M, Saedodin S, Mahian O, Wongwises S., Heat transfer characteristics and pressure drop of COOH-functionalized DWCNTs/water nanofluid in turbulent flow at low concentrations, International Journal of Heat and Mass Transfer, vol. 73, 2014, pp. 186-194.
[8] S. S. M. Chandrasekar, A. Chandra Bose, "Experimental investigations and theoretical determination of thermal conductivity and viscosity of Al2O3/water nanofluid, Experimental Thermal Fluid Science, vol. 34 (2), pp. 210-216, 2010.
[9] A H, T Y, Y S, T A, Magnetic properties of ferromagnetic ultrafine particles prepared by a vacuum evaporation on running oil substrate, Journal of Crystal Growth, vol. 45, 1978, pp. 495–500.
[10] Syam Sundar L, Hashim Farooky M, Naga Sarada S, Singh M.K., Experimental thermal conductivity of ethylene glycol and water mixture based low volume concentration of Al2O3 and CuO nanofluids, Int. Commun. Heat Mass Transfer, vol. 41, 2013, pp. 41–46.
[11] Long G.J, Hautot D, Pankhurst Q.A, Vandormael D, Grandjean F., Mössbauer-effect and X-Ray Absorption Spectral Study of Sonochemically Prepared Amorphous Iron, Physics Review, vol. 57, 1998, pp. 10716-22.
[12] HC B, The viscosity of concentrated suspensions and solution, Journal of Chemical Physics, vol. 20, 1952, pp. 571-81.
