Development of a Three-Dimensional Numerical Model of Sediment Transport and Bed Level Changes in Reservoir Flushing

S.H. Goreishi (1, 2) , Gilmar Mompean (1) , Hassan Naji (1) , M.R.M. Tabatabai (2)

1 Polytech Lille - École polytechnique universitaire de Lille
2 Power and Water University of technology

In this research, the process of sediment flushing is simulated by a three-dimensional numerical model in which sediment and flow interactions are reflected in the reservoirs. Reynolds Averaged Navier-Stokes (RANS) equations are solved numerically by Finite Volume method. A RNG k-epsilon turbulence model is used. The resulting flow analysis is given as input data for the sediment model. The convection-diffusion equation for the sediment concentration is solved. The concentration equation derived by Van Rijn is adopted as a boundary condition to compute bed material load. The depth integrated mass balance equation is applied to find the bed changes. The results from the numerical model are compared favourably with the data from physical model studies available in the literature.

Mots clés: sediment transport; Reservoir Flushing; RANS equations

Domaines: Mécanique [physics]

S.H. Goreishi, Gilmar Mompean, Hassan Naji, M.R.M. Tabatabai. Development of a Three-Dimensional Numerical Model of Sediment Transport and Bed Level Changes in Reservoir Flushing. CFM 2007 - 18ème Congrès Français de Mécanique, Aug 2007, Grenoble, France. ⟨hal-03362019⟩