CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

[ICEM] geometry repair

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   October 14, 2012, 02:56
Default
  #21
Member
 
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 4
yuhehuan is on a distinguished road
I also have a question. If I checked the model, for example the surface after import the igs file into ICEM and it is said that one surface is checked to have a problem. What should i do to repair the surface?
yuhehuan is offline   Reply With Quote

Old   October 14, 2012, 03:47
Default
  #22
Member
 
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 4
yuhehuan is on a distinguished road
Hi, I solved the problem of the mess mesh. But the mesh quality is still bad. So far, I don't know what the problem it is.
Attached Files
File Type: zip project4'.zip (27.3 KB, 6 views)
yuhehuan is offline   Reply With Quote

Old   October 14, 2012, 03:50
Default
  #23
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,967
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
attach blocking
Far is offline   Reply With Quote

Old   October 14, 2012, 04:00
Default
  #24
Member
 
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 4
yuhehuan is on a distinguished road
attach blocking?
yuhehuan is offline   Reply With Quote

Old   October 14, 2012, 04:00
Default
  #25
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,967
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
Yes. .blk file....
Far is offline   Reply With Quote

Old   October 14, 2012, 04:12
Default
  #26
Member
 
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 4
yuhehuan is on a distinguished road
I am so sorry. It is 3 am in my region. So, just a little tired. I attached a new file now.Thank you!
Attached Files
File Type: zip project4'.zip (31.8 KB, 7 views)
yuhehuan is offline   Reply With Quote

Old   October 16, 2012, 12:49
Default
  #27
Member
 
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 4
yuhehuan is on a distinguished road
Hi, Far. I think I found what the problem exsits. I tried to change the outlet to the upper surface to make the inlet not too close to the outlet. And the convergence is better than before. And I guess the uncrtucted mesh I generated is good enough for the fluent calculation. So, as you said, it is not the problem of the tetro mesh, it is the problem of the geometry. But the structed mesh is also bad. But anyway, could you give me a detailed explanation about the idea you said " extend the inlet and outlet domain and apply slip BOCO on them and record the data at the original inlet and outlet planes. " Thank you so so much for your help. I am looking forward to your reply.

Best Wishes!
yuhehuan is offline   Reply With Quote

Old   October 16, 2012, 13:10
Default
  #28
Super Moderator
 
diamondx's Avatar
 
Ghazlani M. Ali
Join Date: May 2011
Location: Canada
Posts: 1,291
Blog Entries: 23
Rep Power: 20
diamondx will become famous soon enough
keep the inlet and outlet in your geometry, in the meshing tab, declare them as "internal wall". Now, extend your outlet. In fluent, the extended outlet will be the real outlet, and the outlet that you declared internal wall will be interior.
The extension is for a stability in the calculation, you are more intererested in knowing what's going wrong in your outlet (interior one). you kept it interior so you can visualize it easily in the post processing. am i clear enough ??? let me know...
__________________
Regards,
New to ICEM CFD, try this document --> http://goo.gl/G2gkE
Ali
diamondx is offline   Reply With Quote

Old   October 16, 2012, 13:20
Default
  #29
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,967
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
Hey Ali
Lets try our skills of hexa meshing on this geometry. What do you say?


@yuhehuan

If you apply the no slip boundary condition on the extended domain then you will have the extra effects of the boundary layer growth and which are not present in the original geometry.
Far is offline   Reply With Quote

Old   October 16, 2012, 13:28
Default
  #30
Super Moderator
 
diamondx's Avatar
 
Ghazlani M. Ali
Join Date: May 2011
Location: Canada
Posts: 1,291
Blog Entries: 23
Rep Power: 20
diamondx will become famous soon enough
@far i will , i'm a little bit busy right now... we keep in touch
__________________
Regards,
New to ICEM CFD, try this document --> http://goo.gl/G2gkE
Ali
diamondx is offline   Reply With Quote

Old   October 16, 2012, 13:35
Default
  #31
Super Moderator
 
diamondx's Avatar
 
Ghazlani M. Ali
Join Date: May 2011
Location: Canada
Posts: 1,291
Blog Entries: 23
Rep Power: 20
diamondx will become famous soon enough
could you get a good blocking so far ??
__________________
Regards,
New to ICEM CFD, try this document --> http://goo.gl/G2gkE
Ali
diamondx is offline   Reply With Quote

Old   October 16, 2012, 13:36
Default
  #32
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,967
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
Quote:
Originally Posted by diamondx View Post
could you get a good blocking so far ??
Hopefully, I will get one by tomorrow. Any update on multi-zone?
Far is offline   Reply With Quote

Old   October 16, 2012, 13:56
Default
  #33
Super Moderator
 
diamondx's Avatar
 
Ghazlani M. Ali
Join Date: May 2011
Location: Canada
Posts: 1,291
Blog Entries: 23
Rep Power: 20
diamondx will become famous soon enough
it worked for one geometry but not the other. trying to investigate the problem more... i realized that the one in which it didn't work had a bad geometry... I'll try everything once again this week end.
__________________
Regards,
New to ICEM CFD, try this document --> http://goo.gl/G2gkE
Ali
diamondx is offline   Reply With Quote

Old   October 16, 2012, 23:19
Default
  #34
Member
 
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 4
yuhehuan is on a distinguished road
Hi, Ali. I am sorry I didn't completely understand your idea. I tried to extend the outlet surface using "extend surface" command. But I am not sure which sub-command shoud be used. Need I extend both inlet and outlet in ICEM or in FLUENT? Thank you so much!

Regards!

Rong

Quote:
Originally Posted by diamondx View Post
keep the inlet and outlet in your geometry, in the meshing tab, declare them as "internal wall". Now, extend your outlet. In fluent, the extended outlet will be the real outlet, and the outlet that you declared internal wall will be interior.
The extension is for a stability in the calculation, you are more intererested in knowing what's going wrong in your outlet (interior one). you kept it interior so you can visualize it easily in the post processing. am i clear enough ??? let me know...
yuhehuan is offline   Reply With Quote

Old   October 17, 2012, 18:19
Default
  #35
Member
 
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 4
yuhehuan is on a distinguished road
I tried to extend the inlet and outlet of my geometry. But I am not sure it's correct. Is is like this after extended?
Attached Images
File Type: jpg 未命名.jpg (20.9 KB, 7 views)
yuhehuan is offline   Reply With Quote

Old   October 17, 2012, 21:11
Default
  #36
Super Moderator
 
diamondx's Avatar
 
Ghazlani M. Ali
Join Date: May 2011
Location: Canada
Posts: 1,291
Blog Entries: 23
Rep Power: 20
diamondx will become famous soon enough
yes that's was i was reffering to, may be more if you can handle large large element. keep your original outlet. declare them as internal wall, and export them as interior...
__________________
Regards,
New to ICEM CFD, try this document --> http://goo.gl/G2gkE
Ali
diamondx is offline   Reply With Quote

Old   October 18, 2012, 19:01
Default
  #37
Member
 
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 4
yuhehuan is on a distinguished road
Hi, Ali. I tried to defined the inlet and outlets as internal walls. But I am not sure how to define. Do I just name it? I divided mesh on the whole geometry after extend the inlet and outlets. The result is as the following picture. Do I just need to divide mesh on the original mesh and split mesh on the internal walls or divide mesh on the geometry including the extension part? Many thanks!
yuhehuan is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[GAMBIT] Geometry repair doodek ANSYS Meshing & Geometry 5 February 10, 2011 15:42
ICEM --- question about repair geometry zhaohui ANSYS Meshing & Geometry 1 April 21, 2010 18:54
repair the geometry in the ANSYS-ICEM feixiangniao ANSYS Meshing & Geometry 3 March 31, 2010 05:53
how to repair geometry by another way Priscila CFX 4 August 2, 2007 11:43
vitual _ real deneb FLUENT 3 January 22, 2007 05:31


All times are GMT -4. The time now is 22:21.