An experimental study on turbulent coherent structures near a sheared air-water interface
文献类型：期刊论文
| 作者 | Wang SF(王双峰) ; Jia F(贾复); Niu ZN(钮珍南); Wu ZZ(吴彰植)
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| 刊名 | Acta Mechanica Sinica
 |
| 出版日期 | 1999 |
| 卷号 | 15期号:4页码:289-298 |
| ISSN号 | 0567-7718 |
| 通讯作者 | Wang, SF (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China. |
| 中文摘要 | The turbulence structures near a sheared air-water interface were experimentally investigated with the hydrogen bubble visualization technique. Surface shear was imposed by an airflow over the water flow which was kept free from surface waves. Results show that the wind shear has the main influence on coherent structures under air-water interfaces. Low- and high- speed streaks form in the region close to the interface as a result of the imposed shear stress. When a certain airflow velocity is reached, "turbulent spots" appear randomly at low-speed streaks with some characteristics of hairpin vortices. At even higher shear rates, the flow near the interface is dominated primarily by intermittent bursting events. The coherent structures observed neat sheared air-water interfaces show qualitative similarities with those occurring in near-wall turbulence. However, a few distinctive phenomena were also observed, including the fluctuating thickness of the instantaneous boundary layer and vertical vortices in bursting processes, which appear to be associated with the characteristics of air-water interfaces. |
| 学科主题 | 力学 |
| 类目[WOS] | Engineering, Mechanical ; Mechanics |
| 研究领域[WOS] | Engineering ; Mechanics |
| 关键词[WOS] | OPEN-CHANNEL FLOW ; SURFACE TURBULENCE ; BOUNDARY-LAYER ; WALL |
| 收录类别 | SCI ; EI ; CSCD |
| 语种 | 英语 |
| WOS记录号 | WOS:000087217100001 |
| 公开日期 | 2007-06-15 ; 2007-12-05 ; 2009-06-23 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/15849]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Wang SF,Jia F,Niu ZN,et al. An experimental study on turbulent coherent structures near a sheared air-water interface[J]. Acta Mechanica Sinica,1999,15(4):289-298. |
| APA | 王双峰,贾复,钮珍南,&吴彰植.(1999).An experimental study on turbulent coherent structures near a sheared air-water interface.Acta Mechanica Sinica,15(4),289-298. |
| MLA | 王双峰,et al."An experimental study on turbulent coherent structures near a sheared air-water interface".Acta Mechanica Sinica 15.4(1999):289-298. |
入库方式： OAI收割
来源：力学研究所
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