[ICEM] Dealing with thin internal walls in geomety

FreeFall79 · October 3, 2013, 17:28

Hi all

slowly but surely making progress in ICEM and have a working case in CFX. In an effort to get my quality up before prism meshing I wanted to know how to deal with geometry with internal walls that are really close together. The octatree mesher wants to jam low quality elements in there and I am not sure how to fix. I have tried knocking out points and lines and that does not work either. I am trying to keep my element count down so I do not want to refine everything to death. I have a big domain as is. Any advice. pic is attached. Thanks in advance.

adunne304 · October 4, 2013, 11:56

Is this a single surface, or two surfaces in close proximity?

FreeFall79 · October 4, 2013, 11:59

two surfaces close together. It was formed due to a divider wall in the geometry. I am doing a tet mesh and it jams elements in there that are of a low quality. I do not want refine to much since this region really is not that important but I wanna fix for future reference plus it seems silly not to be able to figure out a work around.

Any suggestions are much appreciated

adunne304 · October 4, 2013, 12:00

Have you tried thin cuts and/or lowering the edge criterion??

Or actually; these are two internal walls in close proximity, and you do want to have cells in between them? It's hard to tell what's going on from your image.

FreeFall79 · November 13, 2013, 11:16

thanks for the suggestions.

I did try thin cuts which did not help much, I been seeing that thin cuts in only for edges that come together at a shallow angle.

I did lower the edge criterion, are there down sides to having too low a number?

I was able to get a mesh that worked in CFX but my quality was never very good.

October 4, 2013, 11:56		#2
adunne304 New Member Adrian Join Date: Jul 2013 Location: Dublin Posts: 21 Rep Power: 13	Is this a single surface, or two surfaces in close proximity? __________________ www.idacireland.com

October 4, 2013, 12:00		#4
adunne304 New Member Adrian Join Date: Jul 2013 Location: Dublin Posts: 21 Rep Power: 13	Have you tried thin cuts and/or lowering the edge criterion?? Or actually; these are two internal walls in close proximity, and you do want to have cells in between them? It's hard to tell what's going on from your image. __________________ www.idacireland.com

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October 4, 2013, 11:59		#3
FreeFall79 Member Matthew Rich Join Date: Jul 2013 Posts: 33 Rep Power: 12	two surfaces close together. It was formed due to a divider wall in the geometry. I am doing a tet mesh and it jams elements in there that are of a low quality. I do not want refine to much since this region really is not that important but I wanna fix for future reference plus it seems silly not to be able to figure out a work around. Any suggestions are much appreciated

November 13, 2013, 11:16		#5
FreeFall79 Member Matthew Rich Join Date: Jul 2013 Posts: 33 Rep Power: 12	thanks for the suggestions. I did try thin cuts which did not help much, I been seeing that thin cuts in only for edges that come together at a shallow angle. I did lower the edge criterion, are there down sides to having too low a number? I was able to get a mesh that worked in CFX but my quality was never very good.