my mathmatical model is about the water wave formed when the botom of a cylindrical container is drived but the wall of cylinder is not move. so this problem belong to a 3D problem. I don't know if the FLUENT can resolve it. if you want to know the detail information, please contact me . my e-mail address is : jianyongjun@371.net Becase this problem is my ph.d dissertation, so I feel very emergent!!!! please help me...thank you.

It looks like a two-phase flow problem, in which you want to resolve the gas-water interface. Fluent VOF two-phase model should be able to help you out. Please take a look at the tutorial 12 'Water and Air in a Spinning Bowl'. It might be very similar to what you want to simulate. Good luck.

As long as the surface waves are NOT shear driven (e.g. surface of ocean) the free-surface behaviour can be modelled using the VOF model with time-explicit geo-reconstruct scheme, BFW pressure disc., PISO press-vel coupling (with UR's set to 1 for continuity and mom). USe small time-steps to aid convergence. You should require no more than 5 sub-iterations per time step.

when I export my gambit grid of cylinder, the boundary of periodic condition can not be obtained, I don't know how to select my bottom boundary condition. I don't know if Fluent can add the periodic term when I define the boundary conditions. by the way, which kind of boundary condition I should select when I define the top of my cylinder grid? if you know, please tell me, thank you very much.