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| Experiment Study on Sediment Incipience in Backward-Facing Step Flow | |
Liu CR(刘春嵘) ; 呼和敖德; Tao LB; Liu, CR (reprint author), Hunan Univ, Dept Engn Mech, Changsha 410082, Hunan, Peoples R China.
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| Source Publication | JOURNAL OF HYDRODYNAMICS
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| 2007 | |
| Volume | 19Issue:2Pages:173-179 |
| ISSN | 1001-6058 |
| Abstract | Flow over a backward-facing step was studied to investigate the effect of large-scale vortex structures on sediment incipience. The transient flow velocity field at the downstream of the backward-facing step was obtained using the technique of Particle Tracking Velocimetry (PTV). The optical amplification technique was employed to measure the instantaneous flow velocities near the bed and the instantaneous bed shear stress was given. The experimental observations revealed a new insight into the oscillation of the large-scale structure and the three-dimensional characteristics of the flow. In particular, very high turbulence intensity, instantaneous horizontal velocity near the bed and the bed shear stress near the reattachment point were observed. The sediment incipient probability obtained from the sequent images of sediment particles near the bed indicates that the critical instantaneous shear stress of the sediment incipience is independent of flow conditions. |
| Keyword | Backward-facing Step Flow Coherent Structure Sediment Incipience Particle Tracking Velocimetry (Ptv) |
| DOI | 10.1016/S1001-6058(07)60045-6 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000208247800008 |
| WOS Research Area | Mechanics |
| WOS Subject | Mechanics |
| Funding Organization | National Natural Science Foundation of China [10602017] |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/58442 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Liu, CR (reprint author), Hunan Univ, Dept Engn Mech, Changsha 410082, Hunan, Peoples R China. |
| Recommended Citation GB/T 7714 | Liu CR,呼和敖德,Tao LB,et al. Experiment Study on Sediment Incipience in Backward-Facing Step Flow[J]. JOURNAL OF HYDRODYNAMICS,2007,19,2,:173-179. |
| APA | 刘春嵘,呼和敖德,Tao LB,&Liu, CR .(2007).Experiment Study on Sediment Incipience in Backward-Facing Step Flow.JOURNAL OF HYDRODYNAMICS,19(2),173-179. |
| MLA | 刘春嵘,et al."Experiment Study on Sediment Incipience in Backward-Facing Step Flow".JOURNAL OF HYDRODYNAMICS 19.2(2007):173-179. |
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| JourArSuppl2016-150.（435KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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