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Convergence in CFX5.7

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Old   July 20, 2004, 20:26
Default Convergence in CFX5.7
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Dear all

I'm currently running a draft tube problem with 3 outlets. CFX5.7 always complains about backflows into the domain when I specified outlet BCs. I then discarded and rather specified OPENINGS which actually represent the original problem. CFX didn't complain about walls anymore but instead there is a problem with convergence. It just oscillated around 10e-2 as max Residual but the target was 10e-5. I did reduce the timesteps and try all probable causes of this problem but none of them seems to slove the problem. Has anybody encountered such a problem? Any advice or tips on this is highly welcome.

Thanks a lot for responding to this!!

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Old   July 26, 2004, 22:52
Default Re: Convergence in CFX5.7
Glenn Horrocks
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Try using outlets, and moving them further away from the region of interest.

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