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unplausible resultsof ACDC module; export problem?
Posted Jul 16, 2012, 9:45 a.m. EDT Low-Frequency Electromagnetics, Mesh Version 4.2 1 Reply
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Hi,
I'm simulating an experiment and calculate the electric fields in my setup. The results are exported as a textfile which contains the result table. Those results are imported to MATLAB for further use.
While debugging I noticed, that the COMSOL results seem way off, as neighbouring meshpoints have extremely different field values (up to 10 orders of magnitude, differing signs).
My question is: Did I do something wrong while exporting, or should I look for mistakes in my model? Is this a known Problem?
I tried to include my model file, but the forum wouldn't let me (12 MB). So I try to explain some details in short:
rectangular grounded plate
hollow cylinder with electric potential above the ground plate, distance ~20 cm
That's basically it! there are two more plates further away, but that shouldn't be the problem...
Edit: Maybe some screenshots can clarify the whole problem. Screen1 is just an overview, screen2 a top view to show the cylinder in detail. A big block of air surrounding the whole thing is hidden both times to makes everything else visible.
I'm simulating an experiment and calculate the electric fields in my setup. The results are exported as a textfile which contains the result table. Those results are imported to MATLAB for further use.
While debugging I noticed, that the COMSOL results seem way off, as neighbouring meshpoints have extremely different field values (up to 10 orders of magnitude, differing signs).
My question is: Did I do something wrong while exporting, or should I look for mistakes in my model? Is this a known Problem?
I tried to include my model file, but the forum wouldn't let me (12 MB). So I try to explain some details in short:
rectangular grounded plate
hollow cylinder with electric potential above the ground plate, distance ~20 cm
That's basically it! there are two more plates further away, but that shouldn't be the problem...
Edit: Maybe some screenshots can clarify the whole problem. Screen1 is just an overview, screen2 a top view to show the cylinder in detail. A big block of air surrounding the whole thing is hidden both times to makes everything else visible.
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1 Reply Last Post Jul 17, 2012, 4:22 a.m. EDT
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Posted:
1 decade ago
So, I slightly modified my geometry: filling the cylinder and moving it up a bit helped a little. The differences in the electric field are a little lower now (still like 3-4 order of magnitude). Could that be for the strong field inside the cylinder? Any ideas?