[zhubohong]

Hello, everyone
I want to predict the fluaction of free surface, which is affected by bubble flow process, as shown in figure. I simulated three phases flow, top gas, injected gas and liquid steel. The top gas and liquid steel were treated as the continue phase dealed with the Free Surface Model, and injected gas was treated as the dispersed phase dealed with the Particel Model.
However, in the real process, the top gas is actually the injected gas. But in my model, I divided it into two phases, because I want to reflect the free surface flow and bubble column simultaneously.
In addtion, the gas will be pumped out of the reactor in the real process. But I can't simulate this process. So, I want to make the injected gas phase disappear when it meets the top gas phase (when the volume fraction of top gas is equal to 0.95 at the interface). I think it can be achieved by modify the source item in CFX. But I don't kown how to do. I need you guys give me some advices. Thanks!