《《Three-dimensional Numerical Simulation of Vertical Vortex at Hydraulic Intake》.pdf

Available online at Procedia Engineering Procedia Engineering 00 (2011) 000–000 Procedia Engineering 28 (2012) 55 – 60 /locate/procedia 2012 International Conference on Modern Hydraulic Engineering Three-dimensional Numerical Simulation of Vertical Vortex at Hydraulic Intake a,b a a a,b Yunliang CHEN , Chao WU , Bo WANG , Min DU , a* aState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China bCollege of Hydraulic and Hydroelectric Engineering, Sichuan University, Chengdu 610065, China Abstract To investigate an effective numerical model for simulating vertical vortex, turbulent models with VOF method are compared. The effects of the turbulent kinetic energy, the turbulent dissipation rate and the turbulent viscosity on formation and development of vertical vortex are analyzed. It shows that RNG k-ε model is more suitable than standard k-εmodel to the rapidly strained and great curving streamline flows. The calculated spiral flow agrees with the laboratory tests. It may be helpful to the study on generating mechanism of vertical vertex. Keywords: Vertical vortex; Three-dimensional numerical simulation; RNG k-εmodel; Standard k-εmodel; VOF method