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Computing capacitance of a sub domain

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Hi

I've just completed the "computing capacitance" tutorial provided by Comsol here : www.comsol.com/model/computing-capacitance-12689

The model is constituted of a capacitor surrounded by air, and the tutorial shows how to compute the total capacitance, ie that of the dielectric + that of the air surrounding the capacitor. I would like to know how to calculate the individual contribtions of the dielectric and air to the total capacitance, in other words, how to calculate individually the capacitance of the dielectric and the surrounding air.

Thanks !

3 Replies Last Post 16 ago 2016, 08:43 GMT-4
Edgar J. Kaiser Certified Consultant

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Posted: 8 years ago 15 ago 2016, 16:43 GMT-4
Pascal,

you can integrate the electrostatic energy in the subdomains you are interested in.

Cheers
Edgar

--
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Pascal, you can integrate the electrostatic energy in the subdomains you are interested in. Cheers Edgar -- Edgar J. Kaiser emPhys Physical Technology http://www.emphys.com

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Posted: 8 years ago 16 ago 2016, 08:19 GMT-4
Thanks for the reply Edgar.

I was trying to find a way of using the derived values calculated automatically by Comsol, as detailed in the capacitance tutorial (Electrostatics>Terminals>es.C11 - Capacitance). Is this even possible for a sub-domain ?
Thanks for the reply Edgar. I was trying to find a way of using the derived values calculated automatically by Comsol, as detailed in the capacitance tutorial (Electrostatics>Terminals>es.C11 - Capacitance). Is this even possible for a sub-domain ?

Edgar J. Kaiser Certified Consultant

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Posted: 8 years ago 16 ago 2016, 08:43 GMT-4

No, those are global quantities

--
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
No, those are global quantities -- Edgar J. Kaiser emPhys Physical Technology http://www.emphys.com

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