[damlayilm]

I am working on an aeration tankn with multiphase euler k-e model. The diffusers are spread out at the bottom of the tank and they go up with a speed of 0.3m/s. There are inlet and outlet pipes for water in the tank. The water surface is also in the degassing boundary condition. Water velocity is 1m/s. In my boundary conditions, the water velocity is 0 where the air exits. When I draw a streamline, while I expect the air to go to the water surface, it persistently comes out in the water outlet pipe. I think I gave my boundary conditions correctly. Backflow air is also 0. What else do you think it could be? I would be very happy if you could help me