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Comparison of 4.0 amd 4.1

Posted 10 janv. 2011, 11:37 UTC−5 2 Replies

Pekir Joseph
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Hi:

I have a 3D geometry and I am calculating the lumped capacitance. Previously in
comsol version 4.0 I meshed with "tri" and in comsol version 4.1 I understand I must mesh
with "teth" for 3D models. Bur when I solve I get different values of capacitance in both versions.
What may be the cause of that?

Best Regards,
Pekir
2 Replies Last Post 24 janv. 2011, 13:59 UTC−5
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 11 janv. 2011, 10:52 UTC−5
Hi

normally ther has been no change in the 3D meshing types, this is by default "teths" for both 4.0 and 4.1 in 3D. And normally I do neither not see why you should get a different capacitance for the same model in the two versions. So either there is a typo somewhere in a formula, or a translation has missed a point, in my opinion. In any case how close are you to your estimated analytical value ? An what are the differences, could it come from a different meshing density ?

--
Good luck
Ivar
Hi normally ther has been no change in the 3D meshing types, this is by default "teths" for both 4.0 and 4.1 in 3D. And normally I do neither not see why you should get a different capacitance for the same model in the two versions. So either there is a typo somewhere in a formula, or a translation has missed a point, in my opinion. In any case how close are you to your estimated analytical value ? An what are the differences, could it come from a different meshing density ? -- Good luck Ivar
Pekir Joseph
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Posted: 1 decade ago 24 janv. 2011, 13:59 UTC−5
Hi:


I apologize. Its a issue between 3.5 and 4.1. So the same questions as Ive asked before
but now its related to comsol 3.5a and 4.1.


Best Regards,
Pekir
Hi: I apologize. Its a issue between 3.5 and 4.1. So the same questions as Ive asked before but now its related to comsol 3.5a and 4.1. Best Regards, Pekir

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