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

[GAMBIT] Boundary layer in the corner

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 24, 2011, 17:55
Default Boundary layer in the corner
  #1
Senior Member
 
truffaldino's Avatar
 
Join Date: Jan 2011
Posts: 235
Blog Entries: 5
Rep Power: 8
truffaldino is on a distinguished road
Hello,

I will be grateful for info how to deal with the 2d boundary layer on highly convex boundaries ("corners") in GAMBIT. How to fix boundary layer shown on the image attached? I have set "internal continuity" option.

Truffaldino
Attached Images
File Type: jpg internal_continuity.jpg (52.3 KB, 51 views)
truffaldino is offline   Reply With Quote

Old   May 2, 2011, 02:56
Default
  #2
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,972
Rep Power: 30
-mAx- will become famous soon enough
your BL seems to be to thick
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is offline   Reply With Quote

Old   May 6, 2011, 08:56
Default
  #3
Senior Member
 
truffaldino's Avatar
 
Join Date: Jan 2011
Posts: 235
Blog Entries: 5
Rep Power: 8
truffaldino is on a distinguished road
Yes it is thick for Gambit, but represents quite correctly the problem: a small step at the airfoil at low reynolds number. In my case bl size is of order of 1 mm at Re=50000, while the step size is of order of 5-10 mm.
truffaldino is offline   Reply With Quote

Old   May 6, 2011, 09:05
Default
  #4
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,972
Rep Power: 30
-mAx- will become famous soon enough
if the BL is to thick, Gambit should failed to create it.
In your case Gambit creates something.
If you want you can send me your dbs file, I will take a look on monday
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is offline   Reply With Quote

Old   May 7, 2011, 07:57
Default
  #5
Senior Member
 
truffaldino's Avatar
 
Join Date: Jan 2011
Posts: 235
Blog Entries: 5
Rep Power: 8
truffaldino is on a distinguished road
Quote:
Originally Posted by -mAx- View Post
if the BL is to thick, Gambit should failed to create it.
In your case Gambit creates something.
If you want you can send me your dbs file, I will take a look on monday
Thanks a lot mAx,

I have already solved the problem (see image below). I have just meshed edge containing corner using curvature size function.

Truffaldino
Attached Images
File Type: jpg BL.jpg (96.9 KB, 27 views)
truffaldino 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
Default Faces on Boundary Layer axel Open Source Meshers: Gmsh, Netgen, CGNS, ... 8 February 17, 2011 08:47
[GAMBIT] problems in boundary layer yubaibai88 ANSYS Meshing & Geometry 8 April 19, 2010 21:07
Adapt mesh without modifying boundary layer cells? Freeman FLUENT 0 February 22, 2009 15:11
3D Boundary Layer Mario FLUENT 0 February 17, 2009 04:40
Trimmed cell and embedded refinement mesh conversion issues michele OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 2 July 15, 2005 04:15


All times are GMT -4. The time now is 03:23.