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 : 34th Congress - Brisbane (2011) : THEME 7: Hydroinformatics : A numerical simulation of large-scale flow motion in curved channels and rivers
A numerical simulation of large-scale flow motion in curved channels and rivers
Author : Junli Bai, Junhua She, and Pengzhi Lin
A numerical model is developed to simulate large-scale flow motion in curved channels and rivers. The model is based on the two-dimensional shallow-water equations. The model is solved numerically by using finite difference method constructed in Cartesian grid system that is easy to generate (compared to the unstructured grid system that may require complicated remeshing for solving inundation process problems), regardless of the complex natural river geometry. In the large-scale modelling of flows in a curved channel or river, the majority of Cartesian grids will be located on dry land that actually does not require computation, if the conventional two-dimensional array of data storage is used in the coding. In order to make the computation more efficient, a one-dimensional array of grid system is introduced that covers only the domain of interest. By doing so, computational resources (e.g., memory) could be saved in many realistic river modelling. The model will be first validated against laboratory data for turbulent flow in a curved channel. Finally, a case study of large-scale flow motion in a reach of Yangtze River will be simulated by using the proposed model.
File Size : 10,197,794 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 7: Hydroinformatics
Date Published : 01/07/2011
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