IMECH-IR  > 国家微重力实验室
Droplet rebound phenomenon under sudden decrease of gravity
Zhang L(张良); Zhao JF(赵建福)
2013
会议名称64th International Astronautical Congress 2013, IAC 2013
会议日期September 23, 2013 - September 27, 2013
会议地点Beijing, China
会议录名称64th International Astronautical Congress 2013, IAC 2013
页码436-442
摘要The physical process of droplet spreading or wetting on solid surface plays very important role in many industrial applications. On the other hand, for space applications, original static droplet on a flat surface under normal gravity would cause movement when gravity was suddenly decreased due to interfacial recoil. If the recoil is sufficiently strong, the drop would rebound, detachment, bouncing up. Abundant of fluid dynamic characteristics are included in this process which is a novelty and typical fundamental phenomenon in microgravity physics of fluids, and it is very meaningful to reveal the basic law of fluid dynamics. In this study, a liquid drop rebounds on a flat surface caused by sudden decrease of gravity is simulated with Level Set method. The results show that a series of movements of the droplet like rebounding, detachment, bouncing up, oscillation and transformation will be produced by surface recoil after certain degree of sudden decrease of gravity. For the droplet of same size, the ability of rebound is increased and velocity of rising up becomes faster with the increase of gravity falling. The tendency of rebound is increased with the larger of the size when gravity is decreased the same level. No detachment is even occurred for small droplets. Among the droplets detached, the detachment time linearly proportioned with time is extended with the larger of the droplet. However, during rising up, the frequency of surface transformation and oscillation is gradually decreased with the larger of the droplet, the amplitude acts the opposite. Suratman number plays important role in the process of droplet rebound.
关键词Fluid dynamics Numerical methods Space applications Wetting Droplet rebounds Droplet spreading Dynamic characteristics Level Set method Normal gravities Physical process Small droplets Surface transformations
ISBN号9781629939094
收录类别EI
语种英语
文献类型会议论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77981
专题国家微重力实验室
作者单位Key Laboratory of Microgravity (National Microgravity Laboratory)/CAS, Institute of Mechanics, Chinese Academy of Sciences (CAS), 15 Beisihuan Xilu, Beijing 100190, China
推荐引用方式
GB/T 7714
Zhang L,Zhao JF. Droplet rebound phenomenon under sudden decrease of gravity[C],2013:436-442.
条目包含的文件 下载所有文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
EiCpA006.pdf(34KB)会议论文 开放获取CC BY-NC-SA浏览 下载
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[张良]的文章
[赵建福]的文章
百度学术
百度学术中相似的文章
[张良]的文章
[赵建福]的文章
必应学术
必应学术中相似的文章
[张良]的文章
[赵建福]的文章
相关权益政策
暂无数据
收藏/分享
文件名: EiCpA006.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。