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

[ICEM] ICEM Wing

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 24, 2013, 14:42
Default ICEM Wing
  #1
Senior Member
 
Syavash
Join Date: Apr 2010
Location: Tehran, Karaj
Posts: 241
Rep Power: 8
syavash is on a distinguished road
Dear mates,

I want to generate hexa mesh around a 3-D simple wing by ICEM. I have constructed the blocks correctly (I think!) but grid is not generated. I need your help to figure out what the problem is. Simon & Far, I think you can resolve the problem. I have attached my project files and an image.

Thanks
Attached Images
File Type: jpg Untitled.jpg (94.0 KB, 22 views)
Attached Files
File Type: zip ICEM Wing.zip (89.6 KB, 1 views)
syavash is offline   Reply With Quote

Old   June 25, 2013, 08:37
Default
  #2
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
Hi,

There are few problems which should be rectified:

1. No of nodes are very few.

2. Delete block(s) inside wing or change its material

3. Create o-grid inside the wing tip which extends into far field.
Far is offline   Reply With Quote

Old   June 25, 2013, 08:52
Default
  #3
Senior Member
 
Syavash
Join Date: Apr 2010
Location: Tehran, Karaj
Posts: 241
Rep Power: 8
syavash is on a distinguished road
Quote:
Originally Posted by Far View Post
Hi,

There are few problems which should be rectified:

1. No of nodes are very few.

2. Delete block(s) inside wing or change its material

3. Create o-grid inside the wing tip which extends into far field.
Dear Far,

thanks for replying,

I could get your point concerning deleting block inside the wing. But two other points are not clear to me.
I have already constructed an O-grid from tip toward the far-field (as your tutorial in youtube).
Please tell me why I should increase No. of points on the wing? (and how?)
syavash is offline   Reply With Quote

Old   June 25, 2013, 08:56
Default
  #4
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
download video. Upload will take some time (may be 2-3 hrs). mean while you will get message error 403 or 404


https://dl.dropboxusercontent.com/u/68746918/wing.mp4
Far is offline   Reply With Quote

Old   June 25, 2013, 09:04
Default
  #5
Senior Member
 
Syavash
Join Date: Apr 2010
Location: Tehran, Karaj
Posts: 241
Rep Power: 8
syavash is on a distinguished road
Quote:
Originally Posted by Far View Post
download video. Upload will take some time (may be 2-3 hrs). mean while you will get message error 403 or 404


https://dl.dropboxusercontent.com/u/68746918/wing.mp4
As you mentioned I am getting error 404 while downloading it. but let me ask what this video is about?!
syavash is offline   Reply With Quote

Old   June 25, 2013, 09:11
Default
  #6
Senior Member
 
Syavash
Join Date: Apr 2010
Location: Tehran, Karaj
Posts: 241
Rep Power: 8
syavash is on a distinguished road
Quote:
Originally Posted by syavash View Post
Dear Far,

Please tell me why I should increase No. of points on the wing? (and how?)

I think you intended to say that there are not enough MESH points on the edges, am I right?!
syavash is offline   Reply With Quote

Old   June 25, 2013, 09:19
Default
  #7
Senior Member
 
Syavash
Join Date: Apr 2010
Location: Tehran, Karaj
Posts: 241
Rep Power: 8
syavash is on a distinguished road
I think the problem is with the inner face of O-block inside the wing tip. mesh is not generated for that region at the wing root and outer far-field block face.
But the wing tip is totally mesh-less (even the O-grid around the inner face). Why is that so?! Have any Idea??
syavash is offline   Reply With Quote

Old   June 25, 2013, 11:42
Default
  #8
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
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, it shows file is still not uploaded
Far is offline   Reply With Quote

Old   June 29, 2013, 13:04
Default
  #9
Senior Member
 
Syavash
Join Date: Apr 2010
Location: Tehran, Karaj
Posts: 241
Rep Power: 8
syavash is on a distinguished road
Quote:
Originally Posted by Far View Post
yes, it shows file is still not uploaded
Dear Far,

thanks to your comments I could generate the grid properly, now my problem is with boundary conditions. I know how to define BC in 2-D. But in a 3D case I have no experiences. I have tried to build 6 parts by 6 corresponding surfaces of the domain (a cube). Then I have associated the block faces to these 6 surfaces. I think this is a right method but is very time consuming.
Is there any better and shorter way to define BC in a 3D geometry?!

Thanks
syavash is offline   Reply With Quote

Old   June 29, 2013, 13:41
Default
  #10
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
Do not associate faces to surfaces. It is done by icem by default.
Far is offline   Reply With Quote

Old   June 29, 2013, 14:01
Default
  #11
Senior Member
 
Syavash
Join Date: Apr 2010
Location: Tehran, Karaj
Posts: 241
Rep Power: 8
syavash is on a distinguished road
Quote:
Originally Posted by Far View Post
Do not associate faces to surfaces. It is done by icem by default.
So how does Fluent recognize the BC faces?! Shouldn't we associate any elements? what about edges or vertices?!
syavash is offline   Reply With Quote

Old   June 29, 2013, 14:06
Default
  #12
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
It will. However you have to associate edges and vertices to curves and points respectively.
Far 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 sinusoidal leading edge wing in ICEM ryerson_guy ANSYS Meshing & Geometry 39 April 10, 2013 02:57
[ICEM] ICEM mesh problems for sinusoidal leading edge wing ShowponyStuart ANSYS Meshing & Geometry 20 March 21, 2013 20:00
[ICEM] 3d mesh around a wing using ICEM artemis64s ANSYS Meshing & Geometry 6 September 23, 2011 07:59
ICEM meshes inside my wing LBRS Main CFD Forum 6 February 21, 2008 10:09
ICEM - mesh near wing trailing edge Joao Lourenco CFX 5 August 30, 2007 17:20


All times are GMT -4. The time now is 18:29.