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Electric potential and current density analysis

Posted 16 mag 2013, 10:40 GMT-4 Low-Frequency Electromagnetics Version 4.3a 3 Replies

Natasa Arefi
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Dear friends,

I analyzed a model using Time-dependent solver and for the time: range (0, 0.016,1). The model is consisted of different layers with different conductivity and permittivity and a Terminal with an AC current (square waveform, Amplitude:4.4 mA, angular frequency:377Hz ) is applied on top of the layers. When I click on the slice plot the amount of Electric Potential is equal to 14V. But when I plot Line Graph the value of electric potential for the same edge is about KV!!!!? Another question is that why do we have such a current density the same as the attached figure.Could somebody help me to understand the difference? Is there any document about analyzing such the plots?

Regards,

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3 Replies Last Post 20 mag 2013, 07:24 GMT-4
Natasa Arefi
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Posted: 1 decade ago 19 mag 2013, 11:27 GMT-4
Why we have negative current density here? I do not know if there is any problem with my simulation?
I would be grateful if someone help me.
The best,
Why we have negative current density here? I do not know if there is any problem with my simulation? I would be grateful if someone help me. The best,
Edgar J. Kaiser Certified Consultant
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Posted: 1 decade ago 19 mag 2013, 12:34 GMT-4

Hi,

with a time step of 0.016 s you cannot resolve the 377 Hz stimulus. And your plots are strange. What are all the different colors representing?

Cheers
Edgar

--
Edgar J. Kaiser
www.emphys.com
Hi, with a time step of 0.016 s you cannot resolve the 377 Hz stimulus. And your plots are strange. What are all the different colors representing? Cheers Edgar -- Edgar J. Kaiser http://www.emphys.com
Natasa Arefi
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Posted: 1 decade ago 20 mag 2013, 07:24 GMT-4
Hello Mr. Kaiser

I thought that different colors stand for various time. Since when I change the step sizes to larger values (range (0,0.1,1)) I get to another plot that contains less vertical lines, the attached figure. When I want to plot the current density the only possibility to choose are edges!!! How can we select a surface when we plot current density?
I tried to build a simple model including two copper electrodes (electric potential and ground) that between them, there is a resistive layer to analyze the current density using Electric Current. When I choose 3D plot groups->Slice and plot the current density, there is no constant current density distribution inside electric potential electrode!! Why?
Kind regards,
Hello Mr. Kaiser I thought that different colors stand for various time. Since when I change the step sizes to larger values (range (0,0.1,1)) I get to another plot that contains less vertical lines, the attached figure. When I want to plot the current density the only possibility to choose are edges!!! How can we select a surface when we plot current density? I tried to build a simple model including two copper electrodes (electric potential and ground) that between them, there is a resistive layer to analyze the current density using Electric Current. When I choose 3D plot groups->Slice and plot the current density, there is no constant current density distribution inside electric potential electrode!! Why? Kind regards,

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