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Improved formulae of velocity distributions along the vertical and transverse directions in natural rivers with the sidewall effect
Lu, Jinyou1,2; Zhou, Yinjun1,2; Zhu, Yonghui1,2; Xia, Junqiang3; Wei, Li4
Corresponding AuthorXia, Junqiang(xiajq@whu.edu.cn)
2018-12-01
Source PublicationENVIRONMENTAL FLUID MECHANICS
ISSN1567-7419
Volume18Issue:6Pages:1491-1508
AbstractThe distribution of flow velocity is a basis for the research into the transport of flow and sediment in natural rivers. Characteristics of velocity distribution in narrow-deep natural rivers are different from those in wide-shallow open channels, and the effect of sidewalls on the distribution of flow velocity is considerable, which leads to a large transverse gradient of the depth-averaged velocity, with the maximum velocity occurring below the water surface. Based on the Reynolds equation of turbulence flow and the analysis of the features of velocity distribution in natural rivers, improved formulae with two empirical parameters and have been proposed for the velocity distributions along the vertical and transverse directions, with the effect of sidewalls being considered, through solving the definite solution problem by the method of variable separation. The proposed formulae were validated fully through comparisons between the calculated and measured velocity profiles and depth-averaged velocities at several sections in the Yangtze and Baitarani Rivers, with close agreement between them being obtained. The formula of velocity distribution along the transverse direction in natural rivers with the sidewall effect was also compared with previous studies, and the calculation accuracy of this formula at a section with a narrow-deep geometry was higher than the accuracy of the previous equations. It is confirmed that the proposed formulae can reproduce well the distribution characteristics of flow velocity along the vertical and transverse directions in narrow-deep natural rivers, with a more wide application in practice.
KeywordDefinite solution problem Method of variable separation Velocity distribution formula Narrow-deep rivers Sidewall effect
DOI10.1007/s10652-018-9608-6
Indexed BySCI
WOS KeywordOPEN-CHANNEL FLOW ; DEPTH-AVERAGED VELOCITY ; LOG-WAKE-LAW ; DIP-PHENOMENON ; ANALYTICAL-MODEL ; SMOOTH ; ENTROPY ; SHEAR
Language英语
Funding ProjectProgram of the National Key Research and Development Plan[2016YFC0402303/05] ; National Natural Science Foundation of China[51339001] ; National Natural Science Foundation of China[91647117] ; National Natural Science Foundation of China[51725902]
WOS Research AreaEnvironmental Sciences & Ecology ; Mechanics ; Meteorology & Atmospheric Sciences ; Oceanography ; Water Resources
WOS SubjectEnvironmental Sciences ; Mechanics ; Meteorology & Atmospheric Sciences ; Oceanography ; Water Resources
WOS IDWOS:000451034700008
Funding OrganizationProgram of the National Key Research and Development Plan ; National Natural Science Foundation of China
PublisherSPRINGER
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/24451
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorXia, Junqiang
Affiliation1.Changjiang River Sci Res Inst, Wuhan 430010, Hubei, Peoples R China
2.Minist Water Resources, Key Lab River Regulat & Flood Control, Wuhan 430010, Hubei, Peoples R China
3.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Hubei, Peoples R China
4.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610065, Sichuan, Peoples R China
Recommended Citation
GB/T 7714
Lu, Jinyou,Zhou, Yinjun,Zhu, Yonghui,et al. Improved formulae of velocity distributions along the vertical and transverse directions in natural rivers with the sidewall effect[J]. ENVIRONMENTAL FLUID MECHANICS,2018,18(6):1491-1508.
APA Lu, Jinyou,Zhou, Yinjun,Zhu, Yonghui,Xia, Junqiang,&Wei, Li.(2018).Improved formulae of velocity distributions along the vertical and transverse directions in natural rivers with the sidewall effect.ENVIRONMENTAL FLUID MECHANICS,18(6),1491-1508.
MLA Lu, Jinyou,et al."Improved formulae of velocity distributions along the vertical and transverse directions in natural rivers with the sidewall effect".ENVIRONMENTAL FLUID MECHANICS 18.6(2018):1491-1508.
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