论文名称：Boiling from liquid drops impact on a heated wall
论文类型：期刊论文
发表刊物：INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
收录刊物：SCIE、EI、Scopus
卷号：100
页面范围：48-57
ISSN号：0017-9310
关键字：Drop impact; Heated wall; Boiling; Rebound; Spread
摘要：With aid of high-speed imaging, boiling phenomena near the Leidenfrost point from a single liquid drop impact on a heated solid wall were identified, including reflection rebound, explosive rebound and explosive detachment. Wall temperature was ranging in 182-384 degrees C, and water, butanol, ethanol and 5.21% NaCl solution were adopted as the fluids due to their different properties. Transitions in the three boiling phenomena were determined concerning effects of Weber number and wall temperature, respectively. For the process of reflection rebound, the maximum spread factor and resident time of the drop are independent of wall temperature. With an increment in Weber number, the maximum spread factor rises, while its effect on the resident time is minor. Empirical correlations were acquired to predict the maximum spread factor and its corresponding dimensionless time as well as the dimensionless resident time. Moreover, formation of the central liquid jet was observed using the NaCl solution drop, which was interpreted by bubble entrainment with violent nucleating. Finally, preliminary discussions regarding drop detaching time in the explosive detachment process were undertaken. Results revealed that the drop detaching time decreases with Weber number, and wall temperature also can affect it. (C) 2016 Elsevier Ltd. All rights reserved.
发表时间：2016-09-01