[ICEM] problem when reading mesh

yorelchr · April 29, 2013, 06:26

the file is too big if *.zip, how else can I send it?

yorelchr · April 29, 2013, 11:34

ok, I've tried AGAIN.
Now I have another problem of
"Cell Centroid is xc 35.776754 yc 6.767326 zc 0.400559
WARNING: no face with given nodes. Thread 16, cell 10995"
I read on-line that it could be a problem of meshing.

So I opened again the file and got what is on the picture !!! what is it????
I don't know anymore what to do with ICEM !!!!
Everytime I have a different kind of error. Are there some bugs or I don't know?

Far · April 29, 2013, 12:26

@yorelchr: topology is not great.

yorelchr · April 29, 2013, 12:38

what do you mean? what do all these blue lines mean?

Far · April 29, 2013, 12:45

blue lines show internal edges. You have made several y blocks even in the areas where they are not needed

yorelchr · April 29, 2013, 14:39

I have just done Y-blocks for the part down the geometry and the upper-right part. I have done that maybe 30 times, always starting from the geometry (not canceling existing blocks) and it is the first time I get that.
I am really getting mad. It's been exactly 2 weeks I've been trying and I know now that everytime, I will have a different error (interior parts seen as wall, error on cells without mesh like the previous one, mesh not read for I don't know which reason...).

Far · April 29, 2013, 15:35

Quality > 0.8
Angle > 45

I didn't check it in fluent. Just finished blocking and uploaded here. Please check blocking and let me know if something is missing...
https://dl.dropboxusercontent.com/u/...nozzle_Far.zip

Far · April 29, 2013, 15:43

yorelchr · April 29, 2013, 16:13

Thank you very much for this!
I see that I was doing wrong with my Y-blocks.
There were 2 problems when I generated the mesh, maybe because I have not all the files. For one it was ok, I could fix it. For the other, I send you a picture of it.
And I was wrong also since I was trying to avoid the small cells (coming from the beginning) all through the chamber.

Far · April 29, 2013, 17:13

Corrected files...

https://dl.dropboxusercontent.com/u/...-2013_Far2.rar

PS: Wait at least one hour so that files get uploaded on dropbox.

yorelchr · April 29, 2013, 17:52

I can't get the files, I have :
Error (404)
We can't find the page you're looking for. Check out our Help Center and forums for help, or head back to home.

Far · April 29, 2013, 18:54

now check link. it is working

RodriguezFatz · April 30, 2013, 02:45

Far, in this triangle shaped geometry, where you have the three blocks: Is there a way to tell ICEM to make the angle of the three edges in the middle equal (each 120°)? Or do you have to estimate it by hand?
a002x.jpg

Far · April 30, 2013, 03:03

It is done by ICEM. If you adjust everything in place and make the Y block, each angle would measure 120. But once you have changed it, there is no way to ensure it.

yorelchr · May 3, 2013, 03:42

Quote:

Originally Posted by Far

now check link. it is working

Hi Far,

sorry for replying so late but I had to work on something else. I'm now back on this job.
Thank you very much for what you have posted. There is just a problem with periodicity. I've "rebuild" the parts (lato_sx and lato_dx) but the problem remains. So yesterday, AGAIN, I tried by myself and this time all was ok, at least, it seemed. Fluent read without problem, ok also for periodicity, but I encountered a new problem (!!!). I send you the picture. When I go back to ICEM, in the menu on the left, under mesh, I have some shells and the problem seems to be there. However I'm running the case with Fluent and it seems ok but I don't know if the results will be influenced by this...the problem lies at the main inlet : the inlet mesh takes a part of the wall mesh, the wall-ogiva takes a part of wall-inlet...I don't know why I have this situation. When running the case, I import profile at the inlet, so, only cells in the profile are concerned, so maybe the calculations can be ok, but still....why?

Far · May 3, 2013, 03:46

everything seems alright. I am not able to understand where problem lies

yorelchr · May 3, 2013, 05:16

well, maybe I was not really clear in my explanations :-)
the inlet should be just the vertical "blue" part and in fact, when displaying it, I also have a part of the wall.

Far · May 3, 2013, 12:23

delete that block only.

create new block with eight vertices. four are there, and click on four locations approximately.

Associate edges to curves and vertex to point and you are done.

yorelchr · May 3, 2013, 14:26

ok, I'll try that, I'm just afraid that maybe the face between the 2 bocks will be seen as wall in Fluent, already had this problem ... I'll tell you
Thanks again!

Far · May 3, 2013, 14:33

No , it will not happen. don't make any face to surface association

April 29, 2013, 15:43	More pics	#68
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54

April 30, 2013, 02:45		#73
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 26	Far, in this triangle shaped geometry, where you have the three blocks: Is there a way to tell ICEM to make the angle of the three edges in the middle equal (each 120°)? Or do you have to estimate it by hand? a002x.jpg __________________ The skeleton ran out of shampoo in the shower.

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April 29, 2013, 06:26		#61
yorelchr Senior Member christine Join Date: Jul 2009 Location: europe Posts: 125 Rep Power: 16	the file is too big if *.zip, how else can I send it?

April 29, 2013, 12:26		#63
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	@yorelchr: topology is not great.

April 29, 2013, 12:38		#64
yorelchr Senior Member christine Join Date: Jul 2009 Location: europe Posts: 125 Rep Power: 16	what do you mean? what do all these blue lines mean?

April 29, 2013, 12:45		#65
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	blue lines show internal edges. You have made several y blocks even in the areas where they are not needed

April 29, 2013, 14:39		#66
yorelchr Senior Member christine Join Date: Jul 2009 Location: europe Posts: 125 Rep Power: 16	I have just done Y-blocks for the part down the geometry and the upper-right part. I have done that maybe 30 times, always starting from the geometry (not canceling existing blocks) and it is the first time I get that. I am really getting mad. It's been exactly 2 weeks I've been trying and I know now that everytime, I will have a different error (interior parts seen as wall, error on cells without mesh like the previous one, mesh not read for I don't know which reason...).

April 29, 2013, 15:35		#67
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	Quality > 0.8 Angle > 45 I didn't check it in fluent. Just finished blocking and uploaded here. Please check blocking and let me know if something is missing... https://dl.dropboxusercontent.com/u/...nozzle_Far.zip

April 29, 2013, 17:13		#70
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	Corrected files... https://dl.dropboxusercontent.com/u/...-2013_Far2.rar PS: Wait at least one hour so that files get uploaded on dropbox.

April 29, 2013, 17:52		#71
yorelchr Senior Member christine Join Date: Jul 2009 Location: europe Posts: 125 Rep Power: 16	I can't get the files, I have : Error (404) We can't find the page you're looking for. Check out our Help Center and forums for help, or head back to home.

April 29, 2013, 18:54		#72
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	now check link. it is working

April 30, 2013, 03:03		#74
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	It is done by ICEM. If you adjust everything in place and make the Y block, each angle would measure 120. But once you have changed it, there is no way to ensure it.

May 3, 2013, 03:46		#76
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	everything seems alright. I am not able to understand where problem lies

May 3, 2013, 05:16		#77
yorelchr Senior Member christine Join Date: Jul 2009 Location: europe Posts: 125 Rep Power: 16	well, maybe I was not really clear in my explanations :-) the inlet should be just the vertical "blue" part and in fact, when displaying it, I also have a part of the wall.

May 3, 2013, 12:23		#78
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	delete that block only. create new block with eight vertices. four are there, and click on four locations approximately. Associate edges to curves and vertex to point and you are done.

May 3, 2013, 14:26		#79
yorelchr Senior Member christine Join Date: Jul 2009 Location: europe Posts: 125 Rep Power: 16	ok, I'll try that, I'm just afraid that maybe the face between the 2 bocks will be seen as wall in Fluent, already had this problem ... I'll tell you Thanks again!

May 3, 2013, 14:33		#80
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	No , it will not happen. don't make any face to surface association