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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Instability in variables at certain time points

Posted 2011年1月24日 GMT-5 16:27 Results & Visualization, Studies & Solvers Version 4.1 1 Reply

Melissa Rice
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Hi all - I had an issue with instabilities in a variable (concentration) at certain time points. It fluctuates rapidly and then smooths out at other time points. Sometimes it happens even when the variable is much above zero. I wonder what the issue is. Has anyone faced this problem and fixed it? Thanks
1 Reply Last Post 2011年1月24日 GMT-5 16:34
Melissa Rice
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Posted: 1 decade ago 2011年1月24日 GMT-5 16:34
I am assuming this is because of improper damping of errors. The instability however smooths out after sometime. But i don't want any fluctuations to occur in the first place.
I am assuming this is because of improper damping of errors. The instability however smooths out after sometime. But i don't want any fluctuations to occur in the first place.

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