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numerical oscillation in modelling corona discharge with coefficient form PDEs and Electrostatic

Posted 25.05.2012, 05:18 GMT-4 Plasma Physics, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 4.2 3 Replies

Fucheng Deng
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Hi,everyone
I,m working on modelling corona discharge in air with coefficient form PDEs and Electrostatics interface. I'm encountering the problem of numerical oscillation in the simulation area (unexpected negative values show up), but the solver does not give error massage about convergence. Did anybody encounter the same problem? The possible reason for it is that the mesh is not fine enough. I have tried to make the mesh finer, but the problems remain. I want to know whether there are more reasons for the problems. Any advice will be greatly appreciated.
Thanks in advance.


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fucheng
3 Replies Last Post 18.02.2013, 10:19 GMT-5
COMSOL Moderator

Hello Fucheng Deng

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Herek Clack
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Posted: 1 decade ago 14.12.2012, 16:29 GMT-5
Hi Fucheng - I'm also working with ESPs. Have you gotten any help with the oscillation problem you described? Either from someone in this forum or from COMSOL directly?

HC
Hi Fucheng - I'm also working with ESPs. Have you gotten any help with the oscillation problem you described? Either from someone in this forum or from COMSOL directly? HC
Eric Favre COMSOL Employee

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Posted: 1 decade ago 18.02.2013, 10:19 GMT-5
Perhaps the last reply in www.comsol.fr/community/forums/general/thread/28886/ can be of some help.
Regards,

Eric Favre
COMSOL France
Perhaps the last reply in http://www.comsol.fr/community/forums/general/thread/28886/ can be of some help. Regards, Eric Favre COMSOL France
Eric Favre COMSOL Employee

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Posted: 1 decade ago 18.02.2013, 10:19 GMT-5
Perhaps the last reply in www.comsol.fr/community/forums/general/thread/28886/ can be of some help.
Regards,

Eric Favre
COMSOL France
Perhaps the last reply in http://www.comsol.fr/community/forums/general/thread/28886/ can be of some help. Regards, Eric Favre COMSOL France

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

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