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Transient case cannot convergence?

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Old   August 1, 2005, 02:26
Default Transient case cannot convergence?
  #1
Kevin
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An transient problem cannot convergence.

What should I do next?

How to modify the model?
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Old   August 1, 2005, 14:52
Default Re: Transient case cannot convergence?
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CHELSA
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Hey Kevin,

I was under the impression that transient keeps changing with time : correct me if I am wrong. Is there any special case you are running? Can you explain the problem.

Regards
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Old   August 1, 2005, 21:41
Default Re: Transient case cannot convergence?
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Kevin
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Hello,CHELSA ,

There are two large scale box passing each other in this case. Box is 1m*0.4m*0.3m, is filleted .The velocity of the two box is respectively 50m/s and -50m/s. It is versy simple ,but convergence is difficulty to arrive.

I changed the delta time ,but it still divergenced.I 'am confused for the case,what should i do next?
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Old   August 1, 2005, 22:29
Default Re: Transient case cannot convergence?
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som
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Is it cell activation and deactivation?
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Old   August 2, 2005, 16:48
Default Re: Transient case cannot convergence?
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CHELSA
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Hey Kevin,

Looks like it is a case of large tolerences. How much did you give? Try something like 0.001 or closer and also are your momentum equations converging?
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Old   August 3, 2005, 07:35
Default Re: Transient case cannot convergence?
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Kevin
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To Som yes,just as you said.

To Chelsa

Thanks ,I will try again!
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