Effects of wind on the dynamics of the central jet during drop impact onto a deep-water surface

doi:10.1103/PhysRevFluids.3.053602

	Effects of wind on the dynamics of the central jet during drop impact onto a deep-water surface
	Liu, Xinan 1; Wang, An 1; Wang, Shuang 1,3; Dai, Dejun 2
刊名	PHYSICAL REVIEW FLUIDS
	2018-05-14
卷号	3 期号:5
ISSN号	2469-990X
DOI	10.1103/PhysRevFluids.3.053602
英文摘要	The cavity and central jet generated by the impact of a single water drop on a deep-water surface in a wind field are experimentally studied. Different experiments are performed by varying the impacting drop diameter and wind speed. The contour profile histories of the cavity (also called crater) and central jet (also called stalk) are measured in detail with a backlit cinematic shadowgraph technique. The results show that shortly after the drop hits the water surface an asymmetrical cavity appears along the wind direction, with a train of capillary waves on the cavity wall. This is followed by the formation of an inclined central jet at the location of the drop impact. It is found that the wind has little effect on the penetration depth of the cavity at the early stage of the cavity expansion, but markedly changes the capillary waves during the retraction of the cavity. The capillary waves in turn shift the position of the central jet formation leeward. The dynamics of the central jet are dominated by two mechanisms: (i) the oblique drop impact produced by the wind and (ii) the wind drag force directly acting on the jet. The maximum height of the central jet, called the stalk height, is drastically affected by the wind, and the nondimensional stalk height H/D decreases with increasing theta Re-1, where D is the drop diameter, theta is the impingement angle of drop impact, and Re = p(a)U(w)D/mu(a )is the Reynolds number with air density p(a), wind speed U-w, and air viscosity p mu(a).
资助项目	Division of Ocean Science, National Science Foundation[0962107]
WOS关键词	LIQUID SURFACES ; SPLASHING DROPS ; COALESCENCE ; REGIMES ; SOUND ; ENTRAINMENT ; FILMS ; RAIN
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000433003900002
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/26308]
专题	自然资源部第一海洋研究所
通讯作者	Liu, Xinan
作者单位	1.Univ Maryland, Dept Mech Engn, College Pk, MD 20742 USA 2.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Shandong, Peoples R China 3.Xidian Univ, Sch Artificial Intelligence, Xian 710071, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xinan,Wang, An,Wang, Shuang,et al. Effects of wind on the dynamics of the central jet during drop impact onto a deep-water surface[J]. PHYSICAL REVIEW FLUIDS,2018,3(5).
APA	Liu, Xinan,Wang, An,Wang, Shuang,&Dai, Dejun.(2018).Effects of wind on the dynamics of the central jet during drop impact onto a deep-water surface.PHYSICAL REVIEW FLUIDS,3(5).
MLA	Liu, Xinan,et al."Effects of wind on the dynamics of the central jet during drop impact onto a deep-water surface".PHYSICAL REVIEW FLUIDS 3.5(2018).