Author(s): Yuki Kajikawa; Osamu Hinokidani
Linked Author(s): Yuki Kajikawa
Keywords: No Keywords
Abstract: When a flow over a weir includes both subcritical and supercritical flow, a wave jump or a submerged jet is formed in the flow field. In this study, the numerical simulations by 2D vertical model and 3D model were performed for such complex flow over a weir. In the models, the Cartesian coordinate system was adopted, and the FAVOR method was introduced into the governing equations. The k-ε model was used to predict turbulence. The both models were applied to the laboratory experiments. The numerical results of the wave jump by the both models were in good agreement with the experimental data. However, in the case of the submerged jet, the 2D vertical model could not reproduce the flow with sufficient accuracy, but the 3D model was able to reproduce it. Therefore, in order to evaluate the local scouring at the downstream of a weir, the prediction of the phenomenon by not 2D vertical model but 3D model is required.
Year: 2009