CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > Siemens

Problem with Convergence at high flow rates

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

LinkBack Thread Tools Search this Thread Display Modes
Old   April 10, 2007, 08:49
Default Problem with Convergence at high flow rates
Posts: n/a

I am simulating flow through a catalytic converter. ITs a 2-D axisymmetric model. I am having convergence problems when using V2F turbulence model. The problem is the solution converges for low flow rates but doesnt converge at high flow rates say 20 m/s. I have tried using MARS, UD and differencing schems.

Can anyone pls help why its not converging at high flow rates.

Thank You Regards Saleem
  Reply With Quote

Old   April 10, 2007, 15:18
Default Re: Problem with Convergence at high flow rates
Posts: n/a
Are you running a transient or steady state analysis?

How are you defining convergence? Does it diverge? Or does it just not reach a steady value?

Have you tried a simpler turbulence model - say standard k-e?
  Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
convergence problem with high viscosity Jan CFX 0 February 29, 2008 04:01
Flow rates Sileno Phoenics 9 June 1, 2006 07:09
Flow rates in FLAIR Sileno Phoenics 2 August 2, 2005 10:43
different mass flow rates michael FLUENT 4 February 21, 2005 03:48
Order Criteria and Convergence rates Erich FLUENT 0 August 12, 2004 12:05

All times are GMT -4. The time now is 05:04.