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Surface charge density of a floating potential electrode

Posted 16 mai 2011, 13:48 UTC−4 Low-Frequency Electromagnetics Version 4.1 0 Replies

Yu Wang
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Hi,

I try to analyze the charge distribution of a floating potential electrode. so I simulate the surface charge density of a floating potential electrode in eletric field. Please see the attachment. I choose boundary condition of this eletrode is floating potential (charge is 0 C), solver can also work, but there is error if I plot the surface charge density.

"can not evaluate expression:
fail to evaluate variable
variable: mod1.es.nD
fail to evaluate expression:
expression:mod1.es.nD"

I don't know what is wrong about the boundary condition? Or another words, how can I set up the floating potential electrodes in E-field?

thank you very much!
0 Replies Last Post 16 mai 2011, 13:48 UTC−4
COMSOL Moderator

Hello Yu Wang

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