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

Central Differencing Scheme in Fluent

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 19, 2004, 04:35
Default Central Differencing Scheme in Fluent
  #1
alice
Guest
 
Posts: n/a
I used the text command : solve/set/discretization-scheme/mom 3. mom representing momentum, and 3 is the value given for the central differencing scheme. my model does not use large eddie simulation. the manual however says central differencing is only available for LES, but i get a solution which converges differently from the default 1st order upwind scheme. Could it be that Central differencing is available for other models?
  Reply With Quote

Old   March 19, 2004, 09:05
Default Re: Central Differencing Scheme in Fluent
  #2
Melih GULEREN
Guest
 
Posts: n/a
As I know, this scheme is only used for LES and DNS. And for LES, it is strongly advised to use the scheme rather then 1st,2nd or QUICK shemes.

Regards
  Reply With Quote

Old   March 21, 2004, 08:30
Default Re: Central Differencing Scheme in Fluent
  #3
mystic_cfd
Guest
 
Posts: n/a
Hi Alice

You have successfully activated the central-differencing (CD) by using the text interface. Fluent recommends CD for LES and DNS, and it is not possible to activate the model using the GUI (graphics interface) unless you also activate LES in the GUI.

Just be careful when going back to the GUI for settings of the solver. In some cases Fluent complains that you should not be using the CD option without LES and will then automatically re-activate 1st order differencing. Always check that the scheme you want is active by running solve/set/discretization-scheme/mom before starting further iterations.

Enjoy the fairest Cape and may the convergence be with you.
  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
Fluent jobs through pbs ibnkureshi FLUENT 5 June 9, 2011 13:43
MARS differencing scheme Bart CD-adapco 4 January 27, 2005 10:43
Challenge of differencing scheme choice Julie Polyakh CD-adapco 2 July 30, 2003 11:12
Differencing scheme for k-eps model Ron Barer Main CFD Forum 14 November 2, 2000 01:02
Scheme and Fluent UDF? Arthur Valais FLUENT 11 January 31, 2000 14:19


All times are GMT -4. The time now is 01:01.