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help needed with meshing coupled microrings
Posted Nov 24, 2010, 1:31 p.m. EST 1 Reply
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I am having trouble meshing my model of coupled microrings. I have tried free meshing and changing the scale factors, boundary meshing, map meshing and I cannot figure it out. If anyone could help me out, that would be great. I have attached the model file below.
Thanks
Thanks
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1 Reply Last Post Nov 24, 2010, 4:30 p.m. EST
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Posted:
1 decade ago
Hi
I believe the main reason is that youre volumes do not link correcly. In fact you do not have a "well behaved" geometry. You have small long straight cylinders, and circular chapes but these do not meet 100% and you have silver edges/planes at the intersetions, at least 8 or 16 of them !
count the domains: 2*4 tubes +2 large and 2 small and one small joining cylinder = 13 items, the doman list arrive to 29 ! the items are so small that you hardly see them !
How to get around ?
1) make the long thin cylinders somewhat longer in both direction so they really overlap and make a full union with remove internal boundaries selected, the result is one volume object = domain entitiy, but because of the size changes this could be more complex to mesh
2) make the long thin cylinders longer as above, then double each of the 5 Z axis cylinders and substract the extra Z axis cylinders, one by one, from the 8 long thin tubes. Then you end up with 13 clean entities, without overlap and these are easier to mesh individually.
3) make one quarter first (+/-45° around +x, or +y axis) or even 1/8 and then mirror and rotate with the affine transformation available (quicker to build)
get used to check your mesh quality and plot and analyse all items with poor (<0.05 or 0.01) quality
--
Good luck
Ivar
I believe the main reason is that youre volumes do not link correcly. In fact you do not have a "well behaved" geometry. You have small long straight cylinders, and circular chapes but these do not meet 100% and you have silver edges/planes at the intersetions, at least 8 or 16 of them !
count the domains: 2*4 tubes +2 large and 2 small and one small joining cylinder = 13 items, the doman list arrive to 29 ! the items are so small that you hardly see them !
How to get around ?
1) make the long thin cylinders somewhat longer in both direction so they really overlap and make a full union with remove internal boundaries selected, the result is one volume object = domain entitiy, but because of the size changes this could be more complex to mesh
2) make the long thin cylinders longer as above, then double each of the 5 Z axis cylinders and substract the extra Z axis cylinders, one by one, from the 8 long thin tubes. Then you end up with 13 clean entities, without overlap and these are easier to mesh individually.
3) make one quarter first (+/-45° around +x, or +y axis) or even 1/8 and then mirror and rotate with the affine transformation available (quicker to build)
get used to check your mesh quality and plot and analyse all items with poor (<0.05 or 0.01) quality
--
Good luck
Ivar