Numerical simulation and analysis of water flow over stepped spillways  

作　　者：AMADOR António 

机构地区：[1]Hydraulic and Environmental Department, Technologic School of Barreiro, Barreiro 2830-144, Portugal

出　　处：《Science China(Technological Sciences)》2009年第7期1958-1965,共8页中国科学（技术科学英文版）

基　　金：Supported by the National Basic Research Program of China("973"Project)(Grant No.2007CB714106);the National Natural Science Foundation of China(Grant Nos.50539060,50609020)

摘　　要：Numerical simulation of water flow over the stepped spillway is conducted using Mixture multiphase flow model. Different turbulence models are chosen to enclose the controlling equations. The turbulence models investigated are realizable k-ε model, SST k-ω model, v2-f model and LES model. The computational results by the four turbulence models are compared with experimental ones in the following aspects: mean velocity, the spanwise vorticity and the growth of the turbulent boundary layer thickness in the streamwise direction. It is found from the comparison that the realizable k-ε model, in which the rotation tensor is included, shows good performance for simulation of flows involving rotation, boundary layer and recirculation. The realizable k-ε model is the most efficient in simulating flow over stepped spillways. Further, the characteristics of water flow on the stepped spillway are studied in terms of the mean velocity profile normal to the pseudo-bottom and the pressure field on the steps based on the simulation results using realizable k-ε model.Numerical simulation of water flow over the stepped spillway is conducted using Mixture multiphase flow model. Different turbulence models are chosen to enclose the controlling equations. The turbulence models investigated are realizable k-? model, SST k-ω model, v 2-f model and LES model. The computational results by the four turbulence models are compared with experimental ones in the following aspects: mean velocity, the spanwise vorticity and the growth of the turbulent boundary layer thickness in the streamwise direction. It is found from the comparison that the realizable k-? model, in which the rotation tensor is included, shows good performance for simulation of flows involving rotation, boundary layer and recirculation. The realizable k-? model is the most efficient in simulating flow over stepped spillways. Further, the characteristics of water flow on the stepped spillway are studied in terms of the mean velocity profile normal to the pseudo-bottom and the pressure field on the steps based on the simulation results using realizable k-? model.

关 键 词：stepped SPILLWAY TURBULENCE model NUMERICAL simulation BOUNDARY LAYER 

分 类 号：O357.5[理学—流体力学]