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

node number vs convergence

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 22, 2011, 11:55
Default node number vs convergence
  #1
New Member
 
Mike
Join Date: Apr 2011
Posts: 22
Rep Power: 6
josip76 is on a distinguished road
Hi,

Im running a 2D airfoil at M=0.8 and Re=6.5E6 and ive noticed that with 40,000 nodes or around there a solution is calculated on the mesh and accuratly but now im running my grid independance study and i tried doubling and tripling my node count and found that the solution diverged. I was wondering why this would be the case that with a higher node count the case would diverge
josip76 is offline   Reply With Quote

Old   June 22, 2011, 12:25
Default
  #2
Member
 
Nuno Gomes
Join Date: May 2009
Location: Portugal
Posts: 39
Rep Power: 8
Dinocrack is on a distinguished road
maybe your mesh quality get worst....you should see the skewness and try to be below of 0,84
Dinocrack 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
Mesh Refinement Luiz Eduardo Bittencourt Sampaio (Sampaio) OpenFOAM Mesh Utilities 41 January 17, 2013 03:43
convergence problem when use pisoFoam, LES for wind tunnel case Forrest_Lei OpenFOAM 3 July 19, 2011 06:00
mesh file for flow over a circular cylinder Ardalan Main CFD Forum 6 April 17, 2010 23:40
Node Spacing and number of nodes hagupta CFX 1 June 12, 2006 06:45
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 07:56.