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relativ error: point charge (in grounded shell) ~2E-4
Posted 2012年6月5日 GMT-4 11:33 Low-Frequency Electromagnetics, Mesh, Results & Visualization, Studies & Solvers Version 4.2a 2 Replies
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Hallo everybody,
i try to figure out how accurate results from Comsol are by testing simple analyitcal known problems.
The first problem i tried is the point charge in free space (using infinite elements) and a point charge in a grounded shell of 1m radius. I achieved the best results with physical controlled mesh on the finest setting with up to 4 refinement steps and 80GB of available memory, 2 days of computing time on a big machine and my relativ error oszilates with peaks at 2E-4 (or even higher) which is - in the opinion of my supervisor - way to high.
I am desperate to know if i do conceptional misstakes and how to achieve a higher accuray by some oders of magnitude and what your experiences with lower limit of relativ errors are.
I export with full precision :)
Thank you!
i try to figure out how accurate results from Comsol are by testing simple analyitcal known problems.
The first problem i tried is the point charge in free space (using infinite elements) and a point charge in a grounded shell of 1m radius. I achieved the best results with physical controlled mesh on the finest setting with up to 4 refinement steps and 80GB of available memory, 2 days of computing time on a big machine and my relativ error oszilates with peaks at 2E-4 (or even higher) which is - in the opinion of my supervisor - way to high.
I am desperate to know if i do conceptional misstakes and how to achieve a higher accuray by some oders of magnitude and what your experiences with lower limit of relativ errors are.
I export with full precision :)
Thank you!
2 Replies Last Post 2012年6月5日 GMT-4 16:15