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How to Calculate Surface Current Density on Conductor

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Dear All.

I am a newcomer to Comsol. I am currently working on research related to conductor surface gradients and surface current density on AC conductors using AC/DC module, electric current physics and time dependent study on Comsol 5.3.

I have obtained the results of a conductor surface gradient using the formula: sqrt(ec.Ex * ec.Ex+ec.Ey * ec.Ey) in units of V/m.

For surface current density, based on Comsol AC/DC module users guide page 95 is the integration of current density along the width w of the transmission lines. So I use line integration from current density J to calculate surface current density with formula: ec.Jx * nx+ec.Jy * ny in units of A/m

But the results obtained are not as I expected, the results are too large in order A/m, it should be in order nA/m or µA/m I suspect there is an error in using the line integration formula from the current density.

Can you give me a suggestion how to calculate surface current density? Is it correct to use integration from current density J based on Comsol module user guide? Or there are another formula that I can use to calculate surface current density?

I will very grateful if you can help me. Looking forward to hearing your reply and suggestion.

Thank you very much in advance

Best Regards.


0 Replies Last Post Mar 3, 2019, 10:30 AM EST
COMSOL Moderator

Hello Dhika Pratama

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