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Electrostatics - Quadropole

Posted 25.06.2021, 07:02 GMT-4 Low-Frequency Electromagnetics, MEMS & Nanotechnology Version 5.0 1 Reply

Gerard Cummins
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Hello,

I am trying to do a simple simulation of a quadrapole electrostatic system. However, whenever I go to solve I get the message "Failed to find a solution. Singular matrix. There are 900 void equations (empty rows in matrix) for the variable comp1.V.". I have looked at other references to this issue on the forum but yet to find a solution that works. Any insight would be welcome.

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1 Reply Last Post 25.06.2021, 07:39 GMT-4
Edgar J. Kaiser Certified Consultant
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Posted: 3 years ago 25.06.2021, 07:39 GMT-4

Gerard,

set the permittivity in the circle domains to 1 instead of 1e-100 and it solves. You can also remove the domains from the model. It is sufficient to set the boundary conditions. In electrostatics there isn't an electric field inside conductive bodies.

Cheers Edgar

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Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Gerard, set the permittivity in the circle domains to 1 instead of 1e-100 and it solves. You can also remove the domains from the model. It is sufficient to set the boundary conditions. In electrostatics there isn't an electric field inside conductive bodies. Cheers Edgar

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