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electric field intensity and equipotential surfaces

Posted Feb 12, 2014, 6:24 p.m. EST Low-Frequency Electromagnetics Version 4.4 3 Replies

Akim Borbuev
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Hi,
I just started using Comsol. Can anyone help me, please? I want to compute the electric field intensity and plot the equipotential surfaces produced by two cylindrical conductors of radius “r” installed horizontally and separated a distance “d”. The upper one has a potential of +V and the lower -V.

3 Replies Last Post Feb 20, 2014, 10:24 a.m. EST
Sergei Yushanov Certified Consultant
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Posted: 1 decade ago Feb 13, 2014, 8:57 a.m. EST
Akim,

Attached is model of two cylindrical conductors with plot of electrical field and equipotential surfaces.

Best regards,
Sergei
Akim, Attached is model of two cylindrical conductors with plot of electrical field and equipotential surfaces. Best regards, Sergei
Akim Borbuev
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Posted: 1 decade ago Feb 18, 2014, 6:15 p.m. EST
Thank you for your response, Sergei! I could not figure out why there are two bigger circles, why you entered only one voltage, I mean I see only one V which is 1.0 V. Also could you please write down steps to simulate electric fields and equipotential surfaces so that I could simulate with different conductor shapes, conditions, etc.?
Thank you!

Sincerely,
Akim
Thank you for your response, Sergei! I could not figure out why there are two bigger circles, why you entered only one voltage, I mean I see only one V which is 1.0 V. Also could you please write down steps to simulate electric fields and equipotential surfaces so that I could simulate with different conductor shapes, conditions, etc.? Thank you! Sincerely, Akim
Sergei Yushanov Certified Consultant
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Posted: 1 decade ago Feb 20, 2014, 10:24 a.m. EST
Akim,

One big circle is for air domain, and outer layer in Circle 3 is Infinite Element Domain which is defined under Component 1/Definitions.

You can read about Infinite Elements in the documentation Comsol Multiphysics/Reference Manual/Infinite Element Domains and PML, p. 294.

There are two nodes for electric potential: Electric Potential 1 node sets voltage +V0 on the left cylinder, and node Electric Potential 2 node sets voltage –V0 on the right cylindrical conductor.

There are several examples in the Comsol model library with step by step instructions on how to set up this type of problem.

Regards,
Sergei
Akim, One big circle is for air domain, and outer layer in Circle 3 is Infinite Element Domain which is defined under Component 1/Definitions. You can read about Infinite Elements in the documentation Comsol Multiphysics/Reference Manual/Infinite Element Domains and PML, p. 294. There are two nodes for electric potential: Electric Potential 1 node sets voltage +V0 on the left cylinder, and node Electric Potential 2 node sets voltage –V0 on the right cylindrical conductor. There are several examples in the Comsol model library with step by step instructions on how to set up this type of problem. Regards, Sergei

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