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Results of Parametric Sweep Study in Electrostatics

Posted Nov 29, 2011, 5:14 a.m. EST Low-Frequency Electromagnetics, Results & Visualization, Studies & Solvers Version 4.2a 2 Replies

Thomas Schlegl
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Hello!

I'm doing an electrostatic simulation in 2D. I tried to change some model parameters and solved
some line integration (with different Expression)
The out put looks like this (more readable in the attached file):

dummy body_right_distance epsr_body_right Electric potential (V) reacf(V) Capacitance (F)
1 0 1 0 1.82772e-12 4.6351e-11
2 0 80 51.14669 0 1.32642e-9
3 0.1 1 49.2481 0 9.84629e-10
4 0.1 80 47.16981 0 1.0747e-9
5 0.2 1 40.64887 0 8.80712e-10
6 0.2 80 17.34921 1.22422e-12 4.25136e-10
7 0.3 1 0 1.82781e-12 4.63526e-11
8 0.3 80 0 1.9821e-12 4.75052e-11

I don't understand why I get zero values at some positions when evaluating the electric potential
although the reaction force of V is exactly inverse to it???

Thanks for you help,
Thomas

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2 Replies Last Post Nov 30, 2011, 11:25 a.m. EST
Thomas Schlegl
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Posted: 1 decade ago Nov 29, 2011, 6:36 a.m. EST
... another mystery:

I tried it with the following parameter values (three parameters: dummy position eps_r):
1 0 1 2 0 80 3 0.1 1 4 0.1 80 5 0.2 1 6 0.2 80 7 0.3 1
and it worked.
When I added one more:
1 0 1 2 0 80 3 0.1 1 4 0.1 80 5 0.2 1 6 0.2 80 7 0.3 1 8 0.3 80

it doesn't work any more, means I get some zero values in the result!

I really don't understand the difference??




... another mystery: I tried it with the following parameter values (three parameters: dummy position eps_r): 1 0 1 2 0 80 3 0.1 1 4 0.1 80 5 0.2 1 6 0.2 80 7 0.3 1 and it worked. When I added one more: 1 0 1 2 0 80 3 0.1 1 4 0.1 80 5 0.2 1 6 0.2 80 7 0.3 1 8 0.3 80 it doesn't work any more, means I get some zero values in the result! I really don't understand the difference??
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Nov 30, 2011, 11:25 a.m. EST
Hi

indeed not very logical, at least not with only this info, if it repeats regularly it's worth to send the model and the description to "support". They should be able to give your more info

--
Good luck
Ivar
Hi indeed not very logical, at least not with only this info, if it repeats regularly it's worth to send the model and the description to "support". They should be able to give your more info -- Good luck Ivar

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