What package to use?
 

I want to simulate (3D) the process of filling and emptying ship locks.
I want to visualize the velocity of water at various points in the lock (and maybe just outside the lock) and will put some objects (like a MIS [modular inclined screen]) in the lock.

What program can I use best?

I do have experience in simulation of chemical processes but not in this type of simulation.

Of course : if anyone has experience and/or an example with simulation of ship loks I would very much like to get some info.