Validation of numerical model for bubble dispersion over a hydrofoil

This study presents the direct numerical simulations (DNS) of bubbly wake flows. The DNS with Lagrangian particle dynamics (LPD) model is applied to the cases of bubble dispersion over a cylinder and a hydrofoil. The model validation is performed on the experimental data for the bubble behaviour in the wake of a circular cylinder. It is confirmed that the simulated distributions of bubble stream agree well with the trend of the measurement. The effect of angle of attack of a hydrofoil on the downstream bubble distribution is analysed. It is found that bubble stream deflection increases with increasing angle of attack. These results demonstrate that the joint DNS/LPD model can be applied to produce reasonably good results for the problem of bubbble dispersion over a hydrofoil.