Reply To: Simulation of a storage in a lake – Which tool should be used?

[Rob]

Fluent can calculate all of the fluxes. However, the more "outside" you add to the model the larger the cell count, and you then need to model two sets of liquid buoyancy and now, the air space. If the storage is submerged you can neglect the air part. 

You may want to review the AIS Learning content to see what the various solvers do, and also how natural convection is modelled in Fluent.