The turbulence numerical simulation for the stepped spillway overflow

Stepped spillway has increasingly become an effective dissipator. Only if the hydraulic performance of the overflow is clearly known, the energy dissipation can be increased. however, so far the study for the stepped spillway overflow is only based on the model test. In this paper, the k-epsilon turbulence model is used to simulate the complex turbulenct overflow. In order to treat the irregular boundary, unstructured grid is used. Meanwhile, the Volume of Fuid (VOF) method isintroduced to treat the complex free-surface problem. The simulation results are agreed with the experiment data.