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

Convergence problem

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 24, 2005, 07:05
Default Convergence problem
  #1
Saad
Guest
 
Posts: n/a
Can anyone please tell me the techniques of getting a converged solution for unsteady, compressible turbulent flow with species transport.

Sincerely,

Saad
  Reply With Quote

Old   May 24, 2005, 11:13
Default Re: Convergence problem
  #2
Mehdi Ghoddosy
Guest
 
Posts: n/a
You can use low under relaxation factors for the parameters that more divergence is observed. On option is to use low relaxation factor for first time steps/interations and then use high relaxation factor. Using low relaxation factor will slow your solution.

Regards
  Reply With Quote

Old   May 27, 2005, 07:49
Default Re: Convergence problem
  #3
soundar
Guest
 
Posts: n/a
In the solution control panel , go to surface -- > residual . there u could find convergence resolution criteria of 0.001 will be ther u just change it to o.1 and run. Also u could reduce the moment value from default of 0.7 to o.2 as such in the solve,control options. thus u could bring the convergence
  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
convergence problem when use pisoFoam, LES for wind tunnel case Forrest_Lei OpenFOAM 3 July 19, 2011 06:00
convergence problem commonyue Main CFD Forum 1 December 1, 2009 04:54
Convergence of CFX field in FSI analysis nasdak CFX 2 June 29, 2009 01:17
3D Fluid Flow Convergence problem Emily FLUENT 2 March 21, 2007 23:18
Non Convergence of 3D Heat transfer cfd problem Balraj Main CFD Forum 3 December 9, 2004 01:24


All times are GMT -4. The time now is 21:37.