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Failed to find solution

Posted 16 mars 2020, 18:28 UTC+1 Low-Frequency Electromagnetics Version 5.5 2 Replies

Sahil Maharaj
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Hi all

I've been trying to simulate the electric field running throught a conductive liquid, held in a flat plate. I've modeled a high voltage elctrode and a ground electrode, and I've meshed it. But when I try and run the program, I get an error message reading:

*" - Feature: Stationary Solver 1 (sol1/s1) Failed to find a solution. Singular matrix.

There are 1317 void equations (empty rows in matrix) for the variable comp1.V. at coordinates: (0.035,0.02), (0.0333331,0.02), (0.0341665,0.02), (0.0336665,0.0195), (0.0345,0.0195), ...

and similarly for the degrees of freedom (empty columns in matrix). Returned solution is not converged. Not all parameter steps returned."

Does anyone know what causes this, and how I can avoid it? I couldn't find anything on the website. I've attached my file as a reference.

Thanks Sahil

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2 Replies Last Post 17 mars 2020, 11:57 UTC+1
Edgar J. Kaiser Certified Consultant
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Posted: 4 years ago 16 mars 2020, 19:55 UTC+1

Sahil,

I guess almost anybody runs into this. In EC physics all domains need to have some conductivity, it can be very small though. So if the air domain is assigned 1e-24 S/m, like the Teflon domain, the model solves.

Cheers Edgar

-------------------
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Sahil, I guess almost anybody runs into this. In EC physics all domains need to have some conductivity, it can be very small though. So if the air domain is assigned 1e-24 S/m, like the Teflon domain, the model solves. Cheers Edgar
Sahil Maharaj
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Posted: 4 years ago 17 mars 2020, 11:57 UTC+1

Ah I see, it works now. Thanks for help, Edgar. That's really useful.

Ah I see, it works now. Thanks for help, Edgar. That's really useful.

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