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Current flowing in resistive material how to find surrounding field
Posted Nov 14, 2011, 6:22 p.m. EST Low-Frequency Electromagnetics Version 4.2 2 Replies
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I have a simple model (attached) where I have a aluminum disk that has two contact potentials and current flowing through it. Eventually I would like to add other grounded electrodes in the surrounding space, but as soon as I include a surrounding box that I specify as 'air' COMSOL says it can't solve the problem.
What exactly is going wrong when I just have air surrounding my part? In the attached file, just turn the surrounding cube back to enabled to see what I mean. Thanks!
Attachments:
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in the electric currents application mode COMSOL has problems with zero conductivity domains. So you must assign a very small, but non-zero conductivity to the air dpmain. I tried with 1e-99 S/m and it solves.
Cheers
Edgar
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