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Wall jet -tank with rotational flow in 3D

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Old   June 9, 2004, 23:25
Default Wall jet -tank with rotational flow in 3D
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Rodrigo
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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
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Old   June 10, 2004, 03:52
Default Re: Wall jet -tank with rotational flow in 3D
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George
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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
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Old   June 10, 2004, 14:05
Default Re: Wall jet -tank with rotational flow in 3D
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Rodrigo
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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
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