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-   -   [ICEM] How to eliminate overlapping elements? (http://www.cfd-online.com/Forums/ansys-meshing/73827-how-eliminate-overlapping-elements.html)

ringtail March 18, 2010 01:29

How to eliminate overlapping elements?
 
2 Attachment(s)
Hi, everyone

I have generated an O grid mesh, which is showed in the following picture.
When I checked the mesh quality, I found there were some overlapping elements. Who can help me eliminate the overlapping elements?

thanks.

Attachment 2624

Attachment 2625

PSYMN April 21, 2010 18:44

Should not do that...
 
That looks pretty ugly... Hexa should not do that.

Can I see the files?

Simon

ringtail April 21, 2010 23:51

Quote:

Originally Posted by PSYMN (Post 255759)
That looks pretty ugly... Hexa should not do that.

Can I see the files?

Simon

Hi, Simon.
That is my first try to mesh a 2d cylinder. And now i know why it looks so ugly: i have used "smooth mesh globally" function.

Simon, can you help me about my current trouble :how to refine the mesh?
I have described the problem:

http://www.cfd-online.com/Forums/ans...mputation.html

Generally speaking , i mean that i want to coarsen the mesh but the mesh should satisfy the following demand:
1. the first layer mesh should be close enough to the wall to make sure y plus approximate to one.
2. aspect ratio of mesh should not be big in order to be true of FLUENT's limitation.

thanks very much.

zdeth September 24, 2010 16:30

did you find a fix to these overlapping nodes? I'm having a similar problem where it just kinda goes up and folds over on its self..

ringtail September 25, 2010 09:19

Quote:

Originally Posted by zdeth (Post 276577)
did you find a fix to these overlapping nodes? I'm having a similar problem where it just kinda goes up and folds over on its self..

I had smoothed the mesh using ' global smooth'. This was the reason why there were so many overlapping nodes...

PSYMN October 5, 2010 19:22

All set?
 
Hey Ringtail are you all set on this... I can't tell much from your image. I don't even know if you have an Ogrid. I would need better images or the actual files to help any more on this one.

Best regards,

Simon


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