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

ICEM hexa meshing - need help!!

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 23, 2009, 18:27
Default ICEM hexa meshing - need help!!
  #1
New Member
 
Colleen
Join Date: Mar 2009
Posts: 4
Rep Power: 8
cpd29 is on a distinguished road
I am relatively new to ICEM tool and using it for my masters thesis. I am currently in the blocking step and have a difficult geometry feature that I don't know the best way to mesh. I want to use hexa-mesh but the mesh comes out poor quality. Any tips on how to mesh the indicated area (see attachment partition_hole.gif) would be greatly appreciated. I haven't used o-grids and not sure what those are...would it help? I have spent way too much time on this and desperately need some pointers and i havent seen many useful training tools out there.

Thanks!
Colleen

partition_hole.gif

whole_model.gif
cpd29 is offline   Reply With Quote

Old   March 24, 2009, 01:57
Default
  #2
Senior Member
 
Rikio
Join Date: Mar 2009
Location: SH, China
Posts: 182
Blog Entries: 1
Rep Power: 8
rikio is on a distinguished road
Send a message via Skype™ to rikio
Colleen,

It is a simple geometry to mesh in hex. O-grid should be used to improve quality, and high quality mesh is very easy to be obtained.
Regarding what are O-grid, please take a look at the documentation and tutorials. They will tell you what they are.
rikio is offline   Reply With Quote

Old   March 24, 2009, 10:08
Default
  #3
New Member
 
Colleen
Join Date: Mar 2009
Posts: 4
Rep Power: 8
cpd29 is on a distinguished road
If I show you what I have so far for meshing, would you be willing to give me pointers? I can send you a picture or the actual file.

Thanks
Colleen
cpd29 is offline   Reply With Quote

Old   March 24, 2009, 10:21
Default
  #4
Senior Member
 
Rikio
Join Date: Mar 2009
Location: SH, China
Posts: 182
Blog Entries: 1
Rep Power: 8
rikio is on a distinguished road
Send a message via Skype™ to rikio
OK, I think it won't take much time to show you a solution. Just send me the .tin file.
rikio is offline   Reply With Quote

Old   March 24, 2009, 10:24
Default
  #5
Member
 
Pratik Mehta
Join Date: Mar 2009
Posts: 32
Rep Power: 8
pratikmehta is on a distinguished road
Hi,
It seems not so difficiult to mesh this by blocking strategy, O grid surely help but before you need to try some blocking tutorial otherwise you willl spend too much time in just Hex blocking this one. I suggest you can also go for tet mesh with prism layers and see how are the results ,in the mean time you can try hex blocking this geometry .

Best of luck
pratikmehta is offline   Reply With Quote

Old   March 24, 2009, 11:33
Default
  #6
New Member
 
Colleen
Join Date: Mar 2009
Posts: 4
Rep Power: 8
cpd29 is on a distinguished road
See attached file for the .tin file. As you can see, I started the blocking around the curved geometry. I've tried several methods that didn't give a good mesh so this is basically where I started from. The problem is at the corners...not sure what to do about the blocking and mesh there. Any help is much appreciated!

Thanks
Colleen

baseline_turbulators1_meshing.zip
cpd29 is offline   Reply With Quote

Old   March 25, 2009, 03:58
Default
  #7
Member
 
Pratik Mehta
Join Date: Mar 2009
Posts: 32
Rep Power: 8
pratikmehta is on a distinguished road
Hi,

I had a quick look, n i could spot many duplicate curves , first thing you should do is to put all curves in a same family , Unfortunately at work i cannot do things not concerning to work , also we dont have blocking licence anymore , may be in my free time I can suggest you a strategy for blocking.

best of luck
pratikmehta is offline   Reply With Quote

Old   March 25, 2009, 05:58
Default hi!!!
  #8
New Member
 
Join Date: Mar 2009
Location: Hyderabad
Posts: 6
Rep Power: 8
fauka is on a distinguished road
Since the model is symmetric, I used half symmetry. Check out the blocking.
Attached Files
File Type: zip model.zip (93.1 KB, 56 views)
fauka is offline   Reply With Quote

Old   March 25, 2009, 09:35
Default
  #9
Senior Member
 
Rikio
Join Date: Mar 2009
Location: SH, China
Posts: 182
Blog Entries: 1
Rep Power: 8
rikio is on a distinguished road
Send a message via Skype™ to rikio
Hi,

I post a solution, just meshed section you concern.
Attached Files
File Type: zip Mesh.zip (44.8 KB, 42 views)
rikio is offline   Reply With Quote

Old   March 27, 2009, 13:44
Default
  #10
New Member
 
Colleen
Join Date: Mar 2009
Posts: 4
Rep Power: 8
cpd29 is on a distinguished road
Thank you all sooo much for your help! Your solutions really helped me and i can make progress on my thesis again. Again thanks! :-)
cpd29 is offline   Reply With Quote

Old   March 31, 2009, 04:50
Default ICEM Hexa blocking
  #11
New Member
 
Join Date: Mar 2009
Posts: 1
Rep Power: 0
amitdesh1 is on a distinguished road
Hi Colleen,

For the model you are working on, ICEM hexa can work very well. Give 2 transverse splits where you are having this step. Generate a through and through O-grid. Only in the region of this step, put the outer 4 blocks in the family "VORFN". Now the projection of edges would automatically change from "Edge-> none" to "Edge-> Surface". Map the related vertices accordingly.

Hope this helps.

Thanks,
Amit
amitdesh1 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
ICEM Meshing Jaloha CFX 0 April 1, 2008 06:24
Hexa Meshing with ICEM & CFX Matias CFX 2 May 9, 2007 19:57
ICEM CFD Meshing Problems: Hexa Dominant Evan CFX 6 July 3, 2006 12:37
Missing tets along line when meshing with ICEM CFD Georges P. Côté CFX 6 March 23, 2006 01:34
Icem Hexa 2d aerofoil meshing Ste Lakey CFX 0 August 25, 2004 07:05


All times are GMT -4. The time now is 15:44.