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Starter's question to Capcitance between two plates

Posted 1 dic 2011, 07:21 GMT-5 Low-Frequency Electromagnetics, Results & Visualization Version 3.5a 0 Replies

Anjana Karthik Gudipati
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Hi.
I am a new user to COMSOL and I have tried to understand the methodology of working on COMSOL. In the process, I am trying to calculate a very simple problem so as to test my understanding.But, I am facing a few difficulties and would like to request the time of seniors to guide me in the right direction.

Aim:To calculate Capacitance between two plates of width:1m and height 1m seperated by a distance on 1m.(Considering the most simplest case,so as to get Capacitance of 8.854pF, as dielectric is air)

1. Input two rectangles of width 1m and height 1m and seperated them by a distance of 1m.
2. Covered these rectangles with a big box.
3. Input sub-domain settings as Epsilonr =1(by default)
4.Input boundary conditions : Box:All four sides grounded
Bottom rectangle:all four sides grounded
Top rectangle: all four sides supplied with a potential of 1V
5. Meshed it finely and solved it.
6. As far as I understand, the electric field lines make sense.
7. Now, I want to calculate the Electrical Energy density from Sub-domain integration and Surface charge density from Boundary integration but not able to obtain the right values. (I want to understand which boundaries to choose to obtain right results).

Please help me in this regard.

Thanks.

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0 Replies Last Post 1 dic 2011, 07:21 GMT-5
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Hello Anjana Karthik Gudipati

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