图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
雾化与喷雾
影响因子: 1.262 5年影响因子: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN 打印: 1044-5110
ISSN 在线: 1936-2684

卷:
卷 29, 2019 卷 28, 2018 卷 27, 2017 卷 26, 2016 卷 25, 2015 卷 24, 2014 卷 23, 2013 卷 22, 2012 卷 21, 2011 卷 20, 2010 卷 19, 2009 卷 18, 2008 卷 17, 2007 卷 16, 2006 卷 15, 2005 卷 14, 2004 卷 13, 2003 卷 12, 2002 卷 11, 2001 卷 10, 2000 卷 9, 1999 卷 8, 1998 卷 7, 1997 卷 6, 1996 卷 5, 1995 卷 4, 1994 卷 3, 1993 卷 2, 1992 卷 1, 1991

雾化与喷雾

DOI: 10.1615/AtomizSpr.v20.i4.30
pages 297-310

SPLASHING PHENOMENA DURING LIQUID DROPLET IMPACT

Jie Liu
Department of Mechanical Engineering, University of California-Riverside, USA
Henry Vu
Department of Mechanical Engineering, University of California-Riverside, Riverside, USA , Advatech Pacific, Incorporated, Advanced Technology Division, Palmdale, California 93550, USA
Sam S. Yoon
Mechanical Engineering Department, Korea University, Anamdong, 5-Ga, Sungbukgu, Seoul, 136-713, Korea
Richard A. Jepsen
Mechanical Environments, Sandia National Laboratory, P.O. Box 5800, Albuquerque, New Mexico 87185-1135, USA
Guillermo Aguilar
Department of Mechanical Engineering, University of California-Riverside, Riverside, California 92507, USA

ABSTRACT

Splashing is a phenomenon often observed during liquid droplet impact onto a solid surface. The threshold of splashing is known to be related to droplet size, impact velocity, and physical properties of the liquid, but the mechanisms that initiate splashing are not understood completely. In accordance with the Kelvin-Helmholtz (K-H) instability analysis, recent studies have shown that ambient gas density has a significant effect on the threshold and trajectory of splashing. In this study, the effects of droplet velocity, impact angle, and ambient gas pressure (or density) on the threshold of splashing and the motion of the ambient gas surrounding the droplet were examined. Experimental observations of splashing were carried out with a droplet of 1.7 mm in diameter, while varying droplet velocity, impact angle, and ambient pressure. An empirical correlation was derived using our and other published data to determine the threshold of splashing based on the aforementioned parameters. Also, a numerical simulation using the volume of fluid method was carried out to calculate the gas velocities surrounding the droplet during impact. The results of this model gave supportive evidence that K-H instability is a suitable instability theory that helps explain the splash phenomenon with consideration of the gas motion surrounding the droplet.


Articles with similar content:

EFFECTS OF AIR ON SPLASHING DURING A LARGE DROPLET IMPACT: EXPERIMENTAL AND NUMERICAL INVESTIGATIONS
Atomization and Sprays, Vol.16, 2006, issue 8
Sam S. Yoon, Byron Demosthenous
QUANTITATIVE MEASURES OF YIELD-STRESS FLUID DROP IMPACTS ON COATED SURFACES
Atomization and Sprays, Vol.27, 2017, issue 4
Randy H. Ewoldt, Joseph E. Gaudio, Marc E. Deetjen, Brendan C. Blackwell
Enhancement of Evaporation of a Liquid Droplet using EHD Effect: Criteria for Instability of Gas-Liquid Interface Under Electric Field
Journal of Enhanced Heat Transfer, Vol.3, 1996, issue 1
Shigefumi Nishio, Kiyoshi Takano, Ichiro Tanasawa
FUNDAMENTAL CONSIDERATIONS FOR COAL SLURRY ATOMIZATION
Atomization and Sprays, Vol.15, 2005, issue 5
John P. Dooher
AN EXPERIMENTAL STUDY OF A WATER DROPLET IMPACTING ON A ROTATING WAFER
Atomization and Sprays, Vol.19, 2009, issue 10
Fu-Chu Chou, K.-W. Lee, Tain Shi Zen