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surface charge density

Posted 2011年8月9日 GMT-4 12:52 Low-Frequency Electromagnetics, Computational Fluid Dynamics (CFD) Version 4.2 5 Replies

Osameh Ghazian
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hi,

I have placed a water drop between two electrodes and got the results, now I want to plot the charge density in my domain. there is nothing for charge in default parameters of the electrostatic (es) plot groups.

what does this mean ? How can I plot it ?

I just applied two voltage boudary condition in my problem.


best
5 Replies Last Post 2012年1月16日 GMT-5 17:07
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Hello Osameh Ghazian

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Dominic Clarke
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Posted: 1 decade ago 2012年1月16日 GMT-5 09:49
I would also love to be able to plot charge density in my results, anyone know how?
I would also love to be able to plot charge density in my results, anyone know how?
Osameh Ghazian
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Posted: 1 decade ago 2012年1月16日 GMT-5 09:57
hi
in ES (electrostatic) module, Polarization is the charge density and it is available in post processing
hi in ES (electrostatic) module, Polarization is the charge density and it is available in post processing
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2012年1月16日 GMT-5 10:08
HI

but in ES Electro-static charge density isn't it "es.D" ?

or are you in EC electric currents, with air and water conductivity and looking for "ec.rhoq" ?

--
Good luck
Ivar
HI but in ES Electro-static charge density isn't it "es.D" ? or are you in EC electric currents, with air and water conductivity and looking for "ec.rhoq" ? -- Good luck Ivar
Osameh Ghazian
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Posted: 1 decade ago 2012年1月16日 GMT-5 10:58
I think D is the Displacement vector not the charge density. In EC there is charge density in post processing but in ES, I could not find anything beside Polarization.
I think D is the Displacement vector not the charge density. In EC there is charge density in post processing but in ES, I could not find anything beside Polarization.
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2012年1月16日 GMT-5 17:07
Hi

I fully agree D is the displacement, still units C/m^2

--
Good luck
Ivar
Hi I fully agree D is the displacement, still units C/m^2 -- Good luck Ivar

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