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

Buoyancy

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 9, 2001, 11:00
Default Buoyancy
  #1
Elton
Guest
 
Posts: n/a
Dear All,

I am now simulating air flow patern driven by buoyancy. Could anyone tell me what turbulence model should I use and what should I do with other definitions in fluent 4.5. Thanks a lot.
  Reply With Quote

Old   January 9, 2001, 13:31
Default Re: Buoyancy
  #2
Evan Rosenbaum
Guest
 
Posts: n/a
Elton, we've gotten good results for buoyancy-driven air flows using the standard kappa-epsilon turbulence model. Don't use the Bousinnesq approximation with buoyancy unless you have really small temperature gradients.
  Reply With Quote

Old   January 10, 2001, 09:11
Default Re: Buoyancy
  #3
Elton
Guest
 
Posts: n/a
Hi Evan,

Thanks for your response. Could you tell me what fluent code are you using because fluent 4.5 doesn't have standard Kappa-epsilon turbulence model.
  Reply With Quote

Old   January 10, 2001, 13:22
Default Re: Buoyancy
  #4
Evan Rosenbaum
Guest
 
Posts: n/a
We've used FLUENT 4.32, 4.48, 5.1 and 5.4.8.
  Reply With Quote

Old   January 10, 2001, 15:34
Default Kappa-Epsilon??
  #5
Clinton Lafferty
Guest
 
Posts: n/a
kappa-epsilon? Are you refering to the k-epsilon turbulence model based on kinetic energy and turbulent dissipation? If not, please provide a reference.

Thanks, Clinton
  Reply With Quote

Old   January 11, 2001, 08:30
Default Re: Kappa-Epsilon??
  #6
Elton
Guest
 
Posts: n/a
Yes, I got you. Kappa-epsilon is K-e turbulence model.
  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 realize Boussinesq approximation (buoyancy) in Fluent-UDF dochanxu FLUENT 0 October 14, 2010 14:42
Buoyancy Turbulence Chilli83 CFX 3 April 14, 2009 20:28
Buoyancy production for species concentration George Gerber FLUENT 1 May 25, 2006 16:56
Buoyancy models Louwrens CFX 1 June 4, 2003 03:56
How to set the buoyancy model? may song Phoenics 0 November 10, 2002 22:27


All times are GMT -4. The time now is 18:53.