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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 7: Hydroinformatics : Numerical simulation of bed variation in a channel with a series of submerged groins
Numerical simulation of bed variation in a channel with a series of submerged groins
Author : T. Uchida and S. Fukuoka
A practical numerical bed variation method for evaluating various functions of groins in rivers is required. The 2D method is inadequate to simulate local scouring around structures due to 3D flow. On the other hand, full 3D turbulence methods are still limited for applications to floods in natural rivers. Therefore, a refined depth integrated method is required for the practical use. In this paper, the Bottom Velocity Computation (BVC) method is developed to evaluate velocity acting on sediment particles effectively. In the BVC method, depth-integrated horizontal vorticity and water surface velocity equations are computed simultaneously with shallow water equations. To compute bed variation around submerged groins, evaluation methods for non-equilibrium bed load and bed tractive force by using bottom velocity is adopted. The adequacy of the method is discussed through the comparisons with the laboratory experimental results in a channel with a series of submerged groins.
File Size : 953,352 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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