NUMERICAL SIMULATION OF OPEN-CHANNEL FLOWS INCLUDING BUBBLE PLUMES BY USING A GRIDLESS DISCRETE VORTEX METHOD

Abstract

It is very important to reveal the hydrodynamic properties in open-channel flows including the rising-bubbles, when we consider effective control techniques of aeration in actual rivers, sedimentation basins and reservoirs. However, such a bubbly open-channel flow has very complicated phenomena, and thus there are few previous studies that have been tried by high-accurate measurements and numerical simulations. Therefore, in this study, the bubbly open-channel flow was calculated by using a discrete vortex method (DVM). The DVM is a gridless model and applicable to multi-phase flows such as air-induced flows. As the numerical results, it was found that the present model was able to predict the hydrodynamic properties observed in the experimental data.