Pond Boundary Conditions

J.W.

Hello,

I am simulating the process of pumping slurry into the pond where sand, clay and water were stored. I am going to using Multiphase (Euler-Euler) Model. But I can not get converged result due to boundary conditions. Since the slurry was pumped into the pond and level of the slurry will increase, which outlet boundary condition can I set for the surface of the pond (excluding the area used for velocity inlet)?

Thanks,

J.W.