IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 5 - FLUVIAL HYDRAULICS AND RIVER MANAGEMENT : Flow Characteristics in Meandering Channel under Different Hydraulic Conditions
Flow Characteristics in Meandering Channel under Different Hydraulic Conditions
Author : Cuicui Qin, Yan Yang, Xuejun Shao and Jianyin Zhou
The main purpose of this paper was to study the main and secondary flow characteristics in a meandering channel quantitatively under different hydraulic conditions. As most natural reaches are not straight, the study of flow in the meandering channel has practical significance. 3d numerical method has been applied to simulate the flow field in the meandering channel developed by Chang (1971). The simulation results showed good agreements with measured datum at the longitudinal and lateral velocity p rofiles which verified the following discussions as they mainly focused on the analyses of the velocities. The main streamline and secondary flow patterns varied with different water depths and input velocities. With the water depth increasing the main streamline of the first bend moved to the middle of the river. Besides, the positive relationship between water depth and sinuosity of the streamline in the first bend, which was defined as the ratio of it to the valley length, were obtained. The patterns of the secondary flow were greatly influenced by the water depth. There was a width-to-depth ratio as a diving value to the changes of the maximum circulation strength in the first and second bend. In all this paper can provide some references to river regulation.
File Size : 2,119,215 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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