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

convergence issues (discontinuity mastered!)

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 12, 2006, 03:55
Default convergence issues (discontinuity mastered!)
  #1
Matthew R
Guest
 
Posts: n/a
Hi all,

ok, so i have the continuity problems fixed (thanks for all the help). However, now i have convergence issues(i think). I've done about 30,000 iterations and its not converging...residuals are just oscillating: continuity 1.2-1.3e-3, fvar 1.3-1.4e-3, p1 1e-4-1.5e-5.

I'm modelling a tangentially fired coal boiler, following almost exactly the Fluent tute on non-premixed combustion(only geometry different). Running in steady state mode, k-epsilon, p1 radiation..etc...the same as the tute.

Should i be running this in unsteady mode? Also, should i expect a better convergence than this?

Regards, Matt
  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 Centurion2011 FLUENT 24 May 9, 2015 08:02
Force can not converge colopolo CFX 13 October 4, 2011 22:03
convergence issues on steady state solver icemaniac178 CFX 1 March 30, 2011 19:11
Convergence of CFX field in FSI analysis nasdak CFX 2 June 29, 2009 01:17
Grid size, convergence issues franzdrs Main CFD Forum 3 June 18, 2009 07:57


All times are GMT -4. The time now is 05:27.