渦法と粒子追跡法によるT字型合流路内での固液二相流解析および検証実験

抄録

We have developed a coupled numerical simulation of vortex method and particle trajectory tracking method, which is applicable to internal unsteady two-phase flows. It is a completely grid-free Lagrangian-Lagrangian simulation, which is able to simulate the interaction between solid particles and vortical flow. It can handle unsteady high Reynolds number flows. However, so far, no one has applied this kind of method to internal multiphase flows, though many industrial multiphase flows are internal. In this study, internal liquid-solid two-phase flows in a mixing tee had been analyzed by the new method, in which use of the vortex introduction model enables the simulation of the dynamic behavior of separation or reattachment. We simulated and measured particle motions, such as deposition or particle-wall collision, which change according to confluent flow rate ratio. Numerical results based on two-dimensional flow and one-way model showed good agreement with the experimental data. It has been shown that the present method can be useful in the design of industrial multiphase flows.