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Real-world capacitance with partially conductive materials
Posted Jul 22, 2018, 12:44 p.m. EDT Electromagnetics, Low-Frequency Electromagnetics 1 Reply
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Hi all, I have made a 3D open-plate co-planar capacitor model using the tutorials mentioned. However, one thing that is not agreeing with the simulation is this:
If your material is partially conductive, as all real materials, then the electrostaic simulation is not fully correct. Electrostatic simulation in Comsol assumes all surfaces are perfect conductors or isolators (typical for all cap simulations).
To reproduce the reality, you need assign conductive properties to each material (conductive as well and isolating). This means that the ohmic effect will cause a potential difference to develop over all surface (both insulating and conductive, as these are only first order approximations). This changes things significantly depending on the required accuracy.
How would I achieve this? I looked into the tutorial about capacitors and I saw something that mentioned an insulating and conducting field and how the 2 converge etc. But I've not been able to reproduce it. ANy help would be appreciated.
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Dear Richeek,
Thank you for positing your question. I have noticed that you didn't receive an answer yet. If you have access to a license on subscription, I would like to suggest sending an email to support@comsol.com for a swift response.
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Yara Soares
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