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Accession number: 20121214874372 Title: Advances in research on velocity distribution and bed-load transport in unsteady open-channel flow Authors: Ma, Ai-Xing1 ; Lu, Yan1; Lu, Yong-Jun1 ; Cao, Min-Xiong1 Author affiliation: 1 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China Corresponding author: Lu, Y.-J. (yjlu@nhri.cn) Source title: Shuikexue Jinzhan/Advances in Water Science Abbreviated source title: Shuikexue Jinzhan Volume: 23 Issue: 1 Issue date: January 2012 Publication year: 2012 Pages: 134-142 Language: Chinese ISSN: 10016791 CODEN: SHUJE6 Document type: Journal article (JA) Publisher: China Water Power Press, no. 1 Xikang Road, Nanjing, 210024, China Abstract: The vertical velocity profile and bed-load transport in unsteady open-channel flow are major concerns of hydraulics and mechanics of sediment transport. In recent years, many researchers have come to do some serious explorations into the nature of the problems. Progresses on the subject are achieved and challenges for future research are pointed out. In this article we provide an overview of related research achievements including the experimental methodology, the vertical velocity profile and the bed shear stress in unsteady open-channel flow, the flow-sediment hysteresis effect and its reasoning, and the bed-load transport formula. Major deficiencies in current work are pointed out and future research suggestions of topics for focus issues are provided, which includes the study of the law of non-uniform sediment transport in unsteady flow with the advanced instruments. Number of references: 47 Main heading: Research Controlled terms: Anoxic sediments - Open channel flow - Sediment transport - Shear stress Uncontrolled terms: Bed shear stresss - Bed-load transport - Experimental methodology - Hysteresis effect - Unsteadiness parameter - Vertical velocity distribution - Vertical velocity profiles Classification code: 421 Strength of Building Materials; Mechanical Properties - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 631.1 Fluid Flow, General - 631.3 Flow of Fluid-Like Materials - 901.3 Engineering Research DOI: CNKI:32.1309.P.20120104.2014.013 Database: Compendex Compilation and indexing terms, © 2012 Elsevier Inc. Full-text and Local Holdings Links |

3Â¥2013-01-16 16:22:38














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