Flow over a flat plate: BCs

Paolo Lampitella

Hi What kind of boundary conditions should i use if i would simulate the flow around a palette placed on a flat plate? The domain is a rectangular box which has the bottom face as wall and on this there's the palette; the front face is set as velocity inlet and the side faces are periodic. I have trouble in setting the top and exit boundary conditions because the only ones that really works are: velocity inlet on top (Is it physical?) and outflow at the exit face. I would like to know if there are more physical BCs that easily converge. Thank you