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creating geometry

Posted 16 mag 2011, 21:55 GMT-4 Geometry Version 4.0 4 Replies

MEHK
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Hi,

I want to model a plate (100 * 100 * 10) mm which contains nano fibers. we consider that the distrubution of the fibers is uniform and in one single direction which is the direction of flow.
Can anyone suggest how to make this model?

Thank you in advance
4 Replies Last Post 23 mag 2011, 02:14 GMT-4
Edgar Kaiser
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Posted: 1 decade ago 17 mag 2011, 04:29 GMT-4
Hi,

you may need to go for a stepwise approach here. With nanometer fibers in a mm structure you have a scale ratio of 1E6. This too much to directly model the structure.
But you could examine the microscopic structure first and derive anisotropic bulk properties from that and use it as an input for an anisotropic but homogeneous macroscopic model.

There is certainly literature available about multiscale modeling. Try a literature research. I haven't had direct contact with that and can't point you somewhere or provide a recipe.

Cheers
Edgar
Hi, you may need to go for a stepwise approach here. With nanometer fibers in a mm structure you have a scale ratio of 1E6. This too much to directly model the structure. But you could examine the microscopic structure first and derive anisotropic bulk properties from that and use it as an input for an anisotropic but homogeneous macroscopic model. There is certainly literature available about multiscale modeling. Try a literature research. I haven't had direct contact with that and can't point you somewhere or provide a recipe. Cheers Edgar
MEHK
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Posted: 1 decade ago 17 mag 2011, 07:38 GMT-4
Hi Edgar,

Thank you very much for your reply.

If anyone can/like to add something more, Be welcome :)

Regards,
MEHK
Hi Edgar, Thank you very much for your reply. If anyone can/like to add something more, Be welcome :) Regards, MEHK
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 23 mag 2011, 01:58 GMT-4
Hi

A complement of what Edgar is saying: study the anisotropic materials tensor(s)

--
Good luck
Ivar
Hi A complement of what Edgar is saying: study the anisotropic materials tensor(s) -- Good luck Ivar
MEHK
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Posted: 1 decade ago 23 mag 2011, 02:14 GMT-4
Hi,

Thank you very much for the complement.

Best regards,
MEHK
Hi, Thank you very much for the complement. Best regards, MEHK

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