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

Iteration Errors

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 18, 2006, 14:01
Default Iteration Errors
  #1
Vidya Raja
Guest
 
Posts: n/a
Hi,

I have to run a case with laminar unsteady flow. I wrote the UDF that describes the unsteady velocity profile, hooked it up to Fluent. But the simulation seems to be outrageously slow. I even changed to second order upwinding, reduced the relaxation factors. Even then, there's no improvement.

After about 151 iterations (my time step size is 0.01 with 400 time steps), I get an error mesage that says:

Error: divergence detected in AMG solver: y- momentum

Error Object )

What does this mean and how can it be corrected?

Any opinions/ suggestions?

Thanks, Vidya

  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 write k and epsilon before the abnormal end xiuying OpenFOAM Running, Solving & CFD 8 August 27, 2013 15:33
Building OpenFOAM1.7.0 from source ata OpenFOAM Installation 42 May 14, 2012 20:48
Upgraded from Karmic Koala 9.10 to Lucid Lynx10.04.3 bookie56 OpenFOAM Installation 8 August 13, 2011 04:03
IcoFoam parallel woes msrinath80 OpenFOAM Running, Solving & CFD 9 July 22, 2007 02:58
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 18:07


All times are GMT -4. The time now is 22:24.