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Old   January 29, 2001, 23:26
Default Rapid Divergence
  #1
Hojin OH
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I am a starting user of FLUENT. Now when I start iteration, there are always 'Rapid divergence detected..' I cannot understand this because I just changed inlet mole fraction of 4 gases. It never occurred before. So is there any body who has good idea? Please help me.
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Old   January 31, 2001, 15:08
Default Re: Rapid Divergence
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alain
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Check if your residuals are scaled or not in the solve - monitor - residuals menu. If they aren't scaled that explain your error message.

If they are scaled, try to lower your underelaxation factor for mass fraction and continuity/velocities.

Best regards
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