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Electric currents versus electro statics

Posted 2012/05/31 22:48 GMT-4 Results & Visualization, Studies & Solvers Version 4.2a 3 Replies

Josh Lipsmeyer
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I have built the exact same model in both ES and EC. The geometry was imported in so I know it is exactly the same. In the EC package I define a ground plane and an electric potential of 100V. Basically a cathode/anode. In the ES package I do the exact same thing by defining an electric potential of 0V and an electric potential of 100V. However, the values of my electric field in the ES package is drastically different than the value of the electric fields in the EC package. I am not sure why these values are so far off, in the order of 10^6. Any help would be appreciated.

Thanks
3 Replies Last Post 2012/06/01 5:11 GMT-4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2012/06/01 1:28 GMT-4
Hi

that has never happened, so far, to me, so I suspect something is not "exactly the same", but its impossible for us to tell like that.

The main difference is that in ES you have no flow of currents, while i EC the current flows everywhere so a conductor heritates and distributes the moving charges (current). So often setting the BC is quite different in ES and EC

--
Good luck
Ivar
Hi that has never happened, so far, to me, so I suspect something is not "exactly the same", but its impossible for us to tell like that. The main difference is that in ES you have no flow of currents, while i EC the current flows everywhere so a conductor heritates and distributes the moving charges (current). So often setting the BC is quite different in ES and EC -- Good luck Ivar
Magnus Hedlund
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Posted: 1 decade ago 2012/06/01 3:21 GMT-4
Hi,

Build a very small model where you highlight the issue, then we can probably help you more easily! The devil is in the details. ;)

BR
Magnus
Hi, Build a very small model where you highlight the issue, then we can probably help you more easily! The devil is in the details. ;) BR Magnus
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2012/06/01 5:11 GMT-4
Hi

certainly for the Devil and the Details, you do not mind share a simple model so it's easier to understand ?

I did a 1m^2 model yesterday but did not see anything ;)

--
Good luck
Ivar
Hi certainly for the Devil and the Details, you do not mind share a simple model so it's easier to understand ? I did a 1m^2 model yesterday but did not see anything ;) -- Good luck Ivar

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