CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

left-handedness

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 28, 2010, 05:57
Default left-handedness
  #1
Member
 
Hamid
Join Date: Dec 2010
Location: Iran
Posts: 30
Rep Power: 6
L. Hamid is on a distinguished road
When I import mesh to FLUENT and check, it shows "Zone 12: 12314572 right-handed, 165 left-handed". In Gmabit, when i check the volume gird, no problem '0 out of 1 meshed volume failed mesh check for inverted elements'.

When I type command in FLUENT, "grid/modify-zones/repair-face-handedness", it says "Left-handed faces can't be converted to right-handed faces.All face nodes have the right order, but the mesh probably contains non-convex cells."

What shall I do? How to solve the error? the type of the mesh is tetrahedral
L. Hamid is offline   Reply With Quote

Old   December 28, 2010, 22:08
Default
  #2
Senior Member
 
Travis Carrigan
Join Date: Jul 2010
Location: Arlington, TX
Posts: 127
Rep Power: 7
tcarrigan is on a distinguished road
It just means you have some cell with negative volume. For tetrahedral meshes, this typically occurs when you have some poor quality cells, maybe trying to resolve high curvature while not using enough elements causing them to fold over themselves.

Just go through your mesh and make sure your cells aren't highly skewed and increase grid resolution in critical areas. Due to the small number of left-handed cells, I'm assuming they are all in a region that simply wasn't meshed properly resulting in poor cell quality.
tcarrigan 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
How to install CGNS under windows xp? lzgwhy Main CFD Forum 1 January 11, 2011 19:44
CGNS lib and Fortran compiler manaliac Main CFD Forum 2 November 29, 2010 07:25
Left Handedness after Y+ Adaptation Jim FLUENT 0 December 1, 2008 11:48
Right & Left Handedness Rajesh G FLUENT 2 May 15, 2005 08:38
Right & Left Handedness Rajesh G FLUENT 0 May 13, 2005 08:49


All times are GMT -4. The time now is 19:52.