IMECH-IR  > 力学所知识产出(1956-2008)
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.
Source PublicationJOURNAL OF HYDRODYNAMICS
2007
Volume19Issue:2Pages:173-179
ISSN1001-6058
AbstractFlow 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.
KeywordBackward-facing Step Flow Coherent Structure Sediment Incipience Particle Tracking Velocimetry (Ptv)
DOI10.1016/S1001-6058(07)60045-6
Indexed BySCI
Language英语
WOS IDWOS:000208247800008
WOS Research AreaMechanics
WOS SubjectMechanics
Funding OrganizationNational Natural Science Foundation of China [10602017]
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58442
Collection力学所知识产出(1956-2008)
Corresponding AuthorLiu, 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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