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	Evaporation and nucleate boiling of an individual droplet on surfaces
	Wang, X. D. ; Lu, G. ; Peng, X. F. ; Wang, B. X.
	2010-05-10 ; 2010-05-10
会议名称	HT2005: Proceedings of the ASME Summer Heat Transfer Conference 2005, Vol 4 ; ASME Heat Transfer Summer Conference ; San Francisco, CA ; Web of Science
关键词	HEAT-TRANSFER REGIMES WATER DROPLET SOLID-SURFACE CONTACT-ANGLE SPRAY HOT IMPACT PLATE Thermodynamics
中文摘要	A visual study was conducted to investigate the evaporation and nucleate boiling of a water droplet on heated copper, aluminum, or stainless surfaces with temperature ranging from 50 degrees C to 112 degrees C. Using a high-speed video imaging system, the dynamical process of the evaporation of a droplet was recoded to measure the transient variation of its diameter, height, and contact angle. When the contact temperature was lower than the saturation temperature, the evaporation was in film evaporation regime, and the evaporation could be divided into two stages. When the surface temperature was higher than the saturation temperature, the nucleate boiling was observed. The dynamical behavior of nucleation, bubble dynamics droplet were detail observed and discussed. The linear relationships of the average heat flux vs. temperature of the heated surfaces were found to hold for both the film evaporation regime and nucleate boiling regime. The different slopes indicated their heat transfer mechanism was distinct, the heat flux decreased in the nucleate boiling regime more rapidly than in the film evaporation due to the strong interaction between the bubbles.
会议录出版者	AMER SOC MECHANICAL ENGINEERS ; NEW YORK ; THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/19602]
专题	清华大学
推荐引用方式 GB/T 7714	Wang, X. D.,Lu, G.,Peng, X. F.,et al. Evaporation and nucleate boiling of an individual droplet on surfaces[C]. 见:HT2005: Proceedings of the ASME Summer Heat Transfer Conference 2005, Vol 4, ASME Heat Transfer Summer Conference, San Francisco, CA, Web of Science.

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