GSTDTAP  > 地球科学
DOI10.1016/j.atmosres.2016.08.017
A preliminary numerical study on the time-varying fall attitudes and aerodynamics of freely falling conical graupel particles
Chueh, Chih-Che1; Wang, Pao K.1,2; Hashino, Tempei3
2017
发表期刊ATMOSPHERIC RESEARCH
ISSN0169-8095
EISSN1873-2895
出版年2017
卷号183
文章类型Article
语种英语
国家Taiwan; USA; Japan
英文摘要

The flow fields and dynamic motions of conical graupel of diameters 0.5-5 mm falling in air of 800 h Pa and 8 degrees C are studied by solving the transient Navier-Stokes equations numerically for flow past the conical graupel and the body dynamics equations representing the 6-degrees-of-freedom motion that determines the position and orientation of the graupel in response to the hydrodynamic force of the flow fields. The shape of conical graupel made through a simple but practical existing mathematical equation allows us to have an uneven mass distribution, which is generally believed to have great influence on ice particles' orientations while falling when inertial force becomes increasingly dominant over other effects. The simulated motions include vertical fall, lateral translation, sailing, rotation and pendulum swing. The computed flow fields are characterized in terms of streamtrace patterns as well as the voracity magnitude fields, and the corresponding motions of the conical graupel is physically featured by looking upon the graupel surface distributions of pressure coefficient, torques contributed by both pressure as well as viscous effects. Tumbling doesn't occur when an initial orientation of the graupel is either 20 degrees or 160 degrees about Y axis, and the torque contributed by the pressure effect is dominant over that contributed by the viscous effect. (C) 2016 Elsevier B.V. All rights reserved.


英文关键词Ice particle rotation Falling ice particles Low Reynolds numbers Mathematical expressions Hydrodynamic torque Numerical solution Tumbling
领域地球科学
收录类别SCI-E
WOS记录号WOS:000386861800005
WOS关键词HEXAGONAL ICE CRYSTALS ; FLOW-FIELDS ; PRECIPITATION ; SIMULATION ; IMPACT ; AIR ; MICROPHYSICS ; HAILSTONES ; DYNAMICS ; BEHAVIOR
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/15269
专题地球科学
作者单位1.Acad Sinica, Res Ctr Environm Changes, Taipei, Taiwan;
2.Univ Wisconsin, Dept Atmospher & Ocean Sci, Madison, WI 53706 USA;
3.Kyushu Univ, Appl Mech Res Inst, Fukuoka, Japan
推荐引用方式
GB/T 7714
Chueh, Chih-Che,Wang, Pao K.,Hashino, Tempei. A preliminary numerical study on the time-varying fall attitudes and aerodynamics of freely falling conical graupel particles[J]. ATMOSPHERIC RESEARCH,2017,183.
APA Chueh, Chih-Che,Wang, Pao K.,&Hashino, Tempei.(2017).A preliminary numerical study on the time-varying fall attitudes and aerodynamics of freely falling conical graupel particles.ATMOSPHERIC RESEARCH,183.
MLA Chueh, Chih-Che,et al."A preliminary numerical study on the time-varying fall attitudes and aerodynamics of freely falling conical graupel particles".ATMOSPHERIC RESEARCH 183(2017).
条目包含的文件
条目无相关文件。
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
[Chueh, Chih-Che]的文章
[Wang, Pao K.]的文章
[Hashino, Tempei]的文章
百度学术
百度学术中相似的文章
[Chueh, Chih-Che]的文章
[Wang, Pao K.]的文章
[Hashino, Tempei]的文章
必应学术
必应学术中相似的文章
[Chueh, Chih-Che]的文章
[Wang, Pao K.]的文章
[Hashino, Tempei]的文章
相关权益政策
暂无数据
收藏/分享
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。