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

Global Courant Number

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 14, 2009, 05:24
Smile Global Courant Number
  #1
New Member
 
Flatfoosie
Join Date: May 2009
Posts: 3
Rep Power: 8
flatfoosie is on a distinguished road
Hello,
I am using Fluent 6.3.26 to solve a VOF model about Air Pump, but I fall across a difficulty about how to set Variable Time Step Parameters only used in VOF model, thereinto the Global Courant Number I cann't confirm and I have not see any article discussing its reasonable range, and I know its default is 2.
Now I want a larger Time Step Size which can assure convergence to consume fewer time, is it right that I change the default Global Courant Number 2 to 20 if 20 can also assure my model convergence.
I spent ten days to get a result with a computer of 4 CPU & 8G EMS memory & 32 bit WinXP, the Time Step Size I gave is 1e-5, but I feel it is too small and cost me too much time, I still have many types of Air Pump.
Thanks for any reply!

Last edited by flatfoosie; August 14, 2009 at 10:21.
flatfoosie 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
How to write k and epsilon before the abnormal end xiuying OpenFOAM Running, Solving & CFD 8 August 27, 2013 15:33
Mesh Refinement Luiz Eduardo Bittencourt Sampaio (Sampaio) OpenFOAM Mesh Utilities 41 January 17, 2013 03:43
DecomposePar unequal number of shared faces maka OpenFOAM Pre-Processing 6 August 12, 2010 09:01
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 19:07


All times are GMT -4. The time now is 11:12.