Numerical study on multiphase flows around a plane

In order to address the adaptation of the current multiphase flow model and turbulence model to the computations of ventilated multiphase flows and its physical meaning, the numerical simulation of the multiphase flows around a plane was studied and a numerical simulation method was evaluated. It is revealed that, the Mixture model which is based on the idea of single-fluid, has ignored the existing gas-fluid interface, resulting the inconsistency with the experimental results. Due to taking the surface tension into consideration, the Level Set method is able to reflect the fluctuation of interface properly and get a quite consistent result with the experimental results. Based on the standard k-ε model, the filter based model (FBM) decreases the coefficient of the turbulent viscosity by its factor modification, and can also describe subtly the time correlation phenomena of ventilated multiphase flows, so that the better precision of unsteady multiphase flow can be attained.