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.
Re: Rapid Divergence
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.
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