Wall jet -tank with rotational flow in 3D
 

Hi, I am modeling a tank with wall jets in 3D, but the flow field Fluent reports after solution converges (10-4) is really chaotic (lots of eddies and reverse flows). I am conducting a REAL experiment with exactly the same conditions and the flow is totally rotational. I am not sure though if I need to SPECIFY THE ROTATION-AXIS AND DIRECTION-AXIS in the fluid boudary conditions, because I didn't do it. I hope anybody can help me on this. Thanks,

Rodrigo

Re: Wall jet -tank with rotational flow in 3D
 

No, you shouldn't need to specify the axis, it should be predicted by the simulation instead. I think you neet to check material properties and also - what turbulence model are you using? Convergence you should judge also by monitoring e.g. a point value in the tank in order to see if it levels out or oscillates. If it is the second case, than you don't have concergence.

Good luck

George

Re: Wall jet -tank with rotational flow in 3D
 

Thanks George, I'm using the standard k-epsilon model, but tried also with RNG with same results. I am not sure if a follow what you suggests (pick a point and measure levels...), can you tell me how to do it?.

Thanks again,

Rodrigo