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http://dx.doi.org/10.15435/JILASSKR.2014.19.2.82

Comparison of the Characteristics of Sprays between Water and Nanofluid Sprays  

Kang, B.S. (전남대 기계공학부)
Lee, S.P. (경기대 기계시스템공학과)
Publication Information
Journal of ILASS-Korea / v.19, no.2, 2014 , pp. 82-87 More about this Journal
Abstract
Nanofluids are that metallic or nonmetallic nanometer-sized particles are dispersed in liquid. They can be used in various fields to increase the heat transfer rate because the thermal conductivity of nanofluids can be increased significantly. Nanofluids may be used as a good alternative of coolants in spray cooling. This study conducted experiments to compare the characteristics of sprays between water and nanofluid sprays. The radial distributions of droplet velocities and diameters of water, 0.2% wt.(weight), and 0.5% wt. $Al_2O_3$ nanofluids at the pressure of 0.2 and 0.3 MPa were measured by laser doppler instruments. The radial distributions of droplet diameters and velocities at two axial positions with water and 0.2% wt. nanofluid sprays didn't show much difference. A big difference, however, was observed between 0.5% wt. nanofluid and water sprays. With the increase of the mass of nano-particles, the average droplet diameters were increased and the average droplet velocities were decreased.
Keywords
Nanofluid; Nano particles; Spray cooling;
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1 J. H. Kim, "Spray cooling heat transfer: The state of the art", Int. J. of Heat and Fluid Flow, Vol. 28, 2007, pp. 753-767.   DOI   ScienceOn
2 Y. Tao, X. Huai, L. Wang, Z. Guo, "Experimental characterization of heat transfer in non-boiling spray cooling with two nozzles", Applied Thermal Engineering, Vol. 31, 2011, pp. 1790-1797.   DOI   ScienceOn
3 D. S. Zhu, J. Y. Sun, S. D. Tu, Z. D. Wang, "Experimental study of non-boiling heat transfer by high flow rate nanofluids spray", The 6th Int. Symp. on Multiphase Flow, Heat Mass Transfer and Energy Conversion, AIP Conference Proceedings, 2010, pp. 476-482.
4 H. Bellerova, M. Pohanka, M. Raudensky, A. A. Tseng, "Spray cooling by $Al_2O_3$ and $TiO_2$ nanoparticles in water", Thermal and Thermomechanical Phenomena in Electronic Systems 2010, Las Vegas, NV, 2010.
5 T. B. Chang, S. C. Syu, Y. K. Yang, "Effects of particle volume fraction on spray heat transfer performance of $Al_2O_3$-water nanofluid", Int. J. of Heat and Mass Transfer, Vol. 55, 2012, pp. 1014-1021.   DOI   ScienceOn
6 W. Williams, J. Buongiorno, L. Hu, "Experimental investigation of turbulent convective heat transfer and pressure loss of alumina/water and zirconia/water nanoparticle colloids nanofluids in horizontal tubes", J. of Heat Transfer, Vol. 130, No. 4, 2008, 042412.   DOI   ScienceOn
7 O. Zeitoun and M. Ali, "Nanofluid impingement jet heat transfer", Nanoscale Research Letters, Vol. 7, 2012, 139.   DOI   ScienceOn
8 C. D. Martinez, "Heat transfer enhancement of spray cooling with nanofluids", MS Thesis, University of South Florida, 2009.