Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019JD031081 |
The Scale Characteristics and Formation Mechanism of Aeolian Sand Streamers Based on Large Eddy Simulation | |
Wang, Ping1; Feng, ShengJun1; Zheng, XiaoJing2; Sung, Hyung Jin3 | |
2019-11-15 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:21页码:11372-11388 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; South Korea |
英文摘要 | Aeolian sand transport near the surface in the field often occurs in the form of sand streamers, which is very important to understand in-depth the physics of aeolian transport and accurately predict the sand transport rate. In this paper, sand streamers were successfully reproduced by combining the Lagrangian trajectory simulation of particles with large eddy simulation of turbulence. The simulated sand streamers are hill-like. Their characteristic scales are extracted by the two-point correlation of sand concentration. It is found that sand streamers corresponding to the correlation threshold of Rcpcp=0.4 are 2.0-4.5 m long and 0.3-0.4 m wide, while 30-100 m long and 1.2-2.4 m wide for Rcpcp=0.05, which are substantially consistent with the existing field observation results and increases with particle size. Conditional averaging method provided an ensemble-mean visualization of flow structures that are responsible for the formation of streamers. It is found that sand streamers on a flat and erodible surface exist in the near-surface wake area of large/very large scale turbulent motions (LSMs/VLSMs), indicating that sand streamers are the footprint of LSMs/VLSMs. Moreover, the characteristic scales of sand streamers will be affected by the splashing process of sand saltation. On a nonerodible surface, sand streamers trailing from upstream sandy surface become narrow though it can propagate downstream for a long distance. |
英文关键词 | aeolian sand streamers large very large scale turbulent motions large eddy simulation splashing process |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000496623800001 |
WOS关键词 | SEDIMENT TRANSPORT ; MODEL ; VARIABILITY ; MOTIONS |
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/225775 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Lanzhou Univ, Dept Mech, Minist Educ China, Key Lab Mech Disaster & Environm Western China, Lanzhou, Gansu, Peoples R China; 2.Xidian Univ, Sch Mechanoelect Engn, Res Ctr Appl Mech, Xian, Shaanxi, Peoples R China; 3.Korea Adv Inst Sci & Technol, Dept Mech Engn, Daehak Ro, South Korea |
推荐引用方式 GB/T 7714 | Wang, Ping,Feng, ShengJun,Zheng, XiaoJing,et al. The Scale Characteristics and Formation Mechanism of Aeolian Sand Streamers Based on Large Eddy Simulation[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(21):11372-11388. |
APA | Wang, Ping,Feng, ShengJun,Zheng, XiaoJing,&Sung, Hyung Jin.(2019).The Scale Characteristics and Formation Mechanism of Aeolian Sand Streamers Based on Large Eddy Simulation.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(21),11372-11388. |
MLA | Wang, Ping,et al."The Scale Characteristics and Formation Mechanism of Aeolian Sand Streamers Based on Large Eddy Simulation".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.21(2019):11372-11388. |
条目包含的文件 | 条目无相关文件。 |
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。
修改评论