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Force of attraction between 2 mangets is different? HELP
Posted 2014年4月10日 GMT-4 08:04 Low-Frequency Electromagnetics 0 Replies
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I want to determinate force of attraction between 2 magnets then force between 1magnet and 1 ferromagetique bar:
- Dimension: 5x5x2mm with Br = 1.345 (2 Magnets)
- Distance between 2 magnets = [0 - 5mm]
I found this result:
- Force on magnet 1 = 2471mN
- Force on manget 2 = -2549mN
(The result is correct but normally we have to have 2 egal forces)
I'm working on micro-system (force is about miliNewton mN) so this difference between 2 forces is too big for my system.
So my questions:
- How can I do to reduce this difference?
- Can Comsol calculate small force (about ~ 1mN) or not?
P/S: I tried to refine mesh as small as possible until out of memory with direct solver but the results were not satisfactory. The difference is still big.
Thank you
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Hello Nguyen Xuan Huy
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