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

Prisms for boundary layer mesh of turbine blade

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 15, 2010, 11:20
Default Prisms for boundary layer mesh of turbine blade
  #1
New Member
 
Andy Good
Join Date: Jul 2009
Posts: 11
Rep Power: 17
Andy QUB is on a distinguished road
Hello all,

I am attempting to create a tetra mesh for the passage of a wind turbine blade. The initial mesh I am creating seems to work fine (good quality etc). But when I attempt to grow prisms to capture the boundary layer my quality seems to plummet! The worst areas are along the leading and trailing edges of the blade. Presumably this is due to the sharp angles?

Any advice would be greatly appreciated.

Thanks,
Andy
Andy QUB is offline   Reply With Quote

Old   April 16, 2010, 13:05
Default Prism quality...
  #2
Senior Member
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,663
Blog Entries: 1
Rep Power: 47
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
The ICEM CFD Prism quality metric is quite harsh (behind the scenes it subdivides each prism into 3 tetras and gives you the worst quality of the three... A perfectly orthogonal and equilateral prism would divide into some pretty ugly tetras...). In other words, you shouldn't expect a 0.3... Instead, anything over 0.01 is probably good for prisms. Zoom in on some of the bad prisms and take a look... Do they look ok?

If they don't look ok, maybe post a pic...

Also, don't smooth the prisms... Smooth your tetras with the Penta-6 elements Frozen... If you are sure you want to try and smooth your prisms, make sure you set the "upto" very low (like 0.01) and just do a few iterations. Other wise it can really mesh them up...

Best regards,

Simon
PSYMN is offline   Reply With Quote

Reply

Tags
prisms, tetra, wind turbine blade

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[snappyHexMesh] SnappyHexMesh - How to set-up to avoid skewfaces? pcaron OpenFOAM Meshing & Mesh Conversion 36 April 19, 2023 01:38
Wind Turbine Blade Geometry SeanieB Main CFD Forum 0 November 27, 2009 11:18
Meshing a 3D, tapered and twisted blade with Gambit-TGrid teskio ANSYS Meshing & Geometry 0 July 3, 2009 11:36
fluent add additional zones for the mesh file SSL FLUENT 2 January 26, 2008 12:55
Is the boundary layer suitable for dynamic mesh? Lien FLUENT 0 December 26, 2007 02:41


All times are GMT -4. The time now is 21:04.