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Trouble with Simple Point Charge Simulation

Posted Feb 23, 2012, 12:14 p.m. EST Low-Frequency Electromagnetics Version 4.0a 1 Reply

Dennis Earl
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I'm trying to simulate a point charge with 1C of charge I want to look at the electric field value as I move away from the point charge. I know this is terribly simple but I can't get a solution from COMSOL.

Here's what I've done:

1. Started a new 3D file with Stationary Study

1. Constructed a 1 meter sphere and assigned it the material "air" (I also made sure to provide the missing value for relative permittivity for air)

2. Added a point at the center of the sphere (no material assigned to the point)

3. Added a Point Charge to the Electrostatics physics and selected/assigned the point I just added (and gave it a charge of 1C).

4. Then I run the study.

The simulation gets to the point of "Solving Linear Systems" but then hangs up there and finally fails. Error just says "Failed to find a solution"

Any thoughts on what I'm doing wrong would be greatly appreciated?

- Duncan
1 Reply Last Post Feb 23, 2012, 4:45 p.m. EST
Alexander Kuznetsov
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Posted: 1 decade ago Feb 23, 2012, 4:45 p.m. EST
Try this: www.comsol.com/community/forums/general/thread/25020/
Try this: http://www.comsol.com/community/forums/general/thread/25020/

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