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Channel: COMSOL Forums: How to solve the problem of negative concentration
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Re: How to solve the problem of negative concentration

Hi, I am working with COMSOL 5.2 a. Is there still a same function to set as what you said about "if(c<0,eps,c)" ? Cause when I try with Definitions--> variables, it goes red (means can not...

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Re: How to solve the problem of negative concentration

Hello, With regards to the issue of negative concentration in general, please see:www.comsol.com/support/knowledgebase/952/ Based upon some of the previous questions about stabilization in this thread,...

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Re: How to solve the problem of negative concentration

Hi, I know it is in response to your very old post. But I also have the same negative concentration. And I am not able to incorporate the trick you suggested in this post. How do you have 2 variables...

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Re: How to solve the problem of negative concentration

Hi, I haven't use Comsol for ages but I try to remember how this was done. Yes, I have two variables where "c" is Comsol own parameter and "C" is new variable for calcuation purposes. "C" is used in...

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