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 مکانیکمحمد اکبری 1 , امیرحسین سعیدی 2
1 - دانشگاه ازاد اسلامی واحد نجف آباد
2 - کارشناس ارشد دانشگاه آزاد خمینی شهر
الکلمات المفتاحية: Nanofluid", dynamic viscosity", CeO2", EG,
ملخص المقالة :
Nanofluid is prepared through the nanoscale particles suspended in a fluid base and Nanotechnology is a new attempt to investigate the thermal sciences. 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 waste, in this project CeO2 with EG is used to prepare the nanofluid. For stabilization of nanofluid ultrasonic wave is used and viscosity is measured by digital viscometer. In this paper, the effects of temperature and volume fraction on viscosity of nanofluids are considered. This study indicated that the viscosity decrease in all concentrations when temperature is increasing and it increases with additioning volume fraction of nanoparticles. Also, the results show that viscosity changes related to temperature at higher concentrations. After deliberation of rheological properties and laboratory characteristics the exact formula for nanofluids viscosity obtained according to temperature and volume fraction to high accuracy.
[1] Choi S. U. S., Enhancing thermal conductivity of fluids with nanoparticles, Developments Applications of Non-Newtonian Flows, 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), 4, 1993, pp. 227-233.
[3] Wang X, Choi, S. U. S., Thermal conductivity of nanoparticlefluid mixture, Thermophys. Heat Transfer, 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, Therm. Fluid Sci, 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, Appl. Energy, 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, 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, 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," Exp. Therm. Fluid Sci. , 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, 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, 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, 57, 1998, pp. 10716-22.
[12] HC B, The viscosity of concentrated suspensions and solution, Journal of Chemical Physics, 20, 1952, pp. 571-81.
