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구거보(K. B. Ku),박영규(Y. K. Park),김주현(J. H. Kim),김대연(D. Y. Kim),이승재(S. J. Yi),김경천(K. C. Kim) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
The behavior of a droplet impinging on a heated surface is investigated by acquiring droplet images using an ultra high-speed camera. This paper presents a comparative study on Leidenfrost phenomena according to temperature change on a flat plate. We use experimental data to analyze how the Weber number (We), spread factor (β) and maximum diameter in colliding of a water droplet impinging on the surface are related to the droplets behavior during impact and subsequent primary rebound. Experimental results show that a critical We value of 80 is provided which is a predictor for water droplet splashing for the surface.