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물과 나노유체 액적의 고온 벽면에서의 증발 특성에 관한 연구
김진한 ( J. H. Kim ),이경재 ( K. J. Lee ),정선욱 ( S. W. Jung ),강보선 ( B. S. Kang ) 한국액체미립화학회 2016 한국액체미립화학회지 Vol.21 No.4
In this study, the evaporation characteristics of water or nanofluid droplets on a heated surface was investigated by visualization of the evaporation process and evaluation of the heat transfer coefficient using the droplet temperature measured. The evaporation characteristics was compared between water and nanofluid droplets and the effects of the mass ratio of nanofluid and the inclination of heated surface were analyzed. The heat transfer rate of nanofluid droplet was higher than that of water droplet. The heat transfer coefficient was increased with the increase of the mass ratio of nanofluid. The effect of the inclination of heated surface was much higher than that of fluid type used, which indicates that the inclination of heated surface should be considered as one of influential parameters in the spray cooling process.