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Defining extra solving constraints

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Hi,

I’m trying to model an electrode recording the electrical potential generated within a complex medium.
“Unfortunately” the exposed metallic part of my electrode (a small metallic disk) has a really small thickness compared to the rest of the dimension of the model. This makes it quite difficult to properly mesh the electrode. And this super heavy mesh makes the computing super long…
My idea would have been to approximate the metallic disk with a constraint that would stipulate that this surface has to be isopotential.
Does somebody know a way to do this?
Or does anybody have a better idea of how to make the whole solving faster? (I have to run simulation for a lot of different parameters)

Thanks!
B

2 Replies Last Post 2014年5月29日 GMT-4 09:14
Jeff Hiller COMSOL Employee

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Posted: 1 decade ago 2014年5月28日 GMT-4 10:48
Hello Beryl,
The AC/DC Module, MEMS Module, Semiconductor Module and Plasma Module include a boundary condition for electrostatics called "Floating Potential" that does what I think you want, i.e. specify that an entire boundary is at a single not-known-in-advance electric potential.
Best,
Jeff
Hello Beryl, The AC/DC Module, MEMS Module, Semiconductor Module and Plasma Module include a boundary condition for electrostatics called "Floating Potential" that does what I think you want, i.e. specify that an entire boundary is at a single not-known-in-advance electric potential. Best, Jeff

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Posted: 1 decade ago 2014年5月29日 GMT-4 09:14
ok thanks!
ok thanks!

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