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

Some failures in the linearization of the solution

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 18, 2012, 16:44
Default Some failures in the linearization of the solution
  #1
New Member
 
Join Date: Jun 2012
Posts: 9
Rep Power: 5
Geraud is on a distinguished road
Hello everyone,

I have a simple question for you:

In the first iteration of few timesteps of my transient simulation, the solver fails to linearize the solution (Got some 'F' for the momentum equations) but after the second iteration it does fine ('OK').

Is the first iteration of a timestep has any impact on the result written for the current timestep? Can I still trust the result of those specific timesteps?

Thanks,
Geraud.
Geraud is offline   Reply With Quote

Old   September 18, 2012, 19:32
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,831
Rep Power: 85
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
It is the final convergence which is important. So if comes good by the end of the time step then you are OK.
ghorrocks is offline   Reply With Quote

Old   September 19, 2012, 13:11
Default
  #3
New Member
 
Join Date: Jun 2012
Posts: 9
Rep Power: 5
Geraud is on a distinguished road
Good news!

Thanks,
Geraud.
Geraud 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
grid dependancy gueynard a. Main CFD Forum 19 June 27, 2014 21:22
Integrated conjugate heat transfer solver in OpenFOAM hjasak OpenFOAM Running, Solving & CFD 168 June 27, 2013 01:56
IcoFoam parallel woes msrinath80 OpenFOAM Running, Solving & CFD 9 July 22, 2007 02:58
Mesh independent solution CFX Begineer CFX 0 October 27, 2002 11:54
Wall functions Abhijit Tilak Main CFD Forum 6 February 5, 1999 02:16


All times are GMT -4. The time now is 23:45.