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

Turbulence Model?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 2, 2001, 14:02
Default Turbulence Model?
  #1
siswara
Guest
 
Posts: n/a
Hi , right now I'm modelling 3D centrifugal fan. I had difficulties to determine what turbulence model which gives accurate and reliable results.

Any suggestions?
  Reply With Quote

Old   August 3, 2001, 21:37
Default Re: Turbulence Model?
  #2
chiseung
Guest
 
Posts: n/a
In my opinion, finding related papers or experimnetal data would be better.

P.S. Reynolds Stress Model is the best "generally".
  Reply With Quote

Old   August 18, 2001, 14:33
Default Re: Turbulence Model?
  #3
john
Guest
 
Posts: n/a
goblok , ngono wae gak iso , dancuk koen, asu
  Reply With Quote

Old   August 19, 2001, 02:25
Default Re: Turbulence Model?
  #4
Chetan Kadakia
Guest
 
Posts: n/a
Which language is John speaking in?

All the models work but they all suck.

It all depends on your problem, computer power, and desired results.

RSM is good, but I think LES is better if the mesh is fine enough. I think of LES as the next closest thing to DNS.

k-epsilon models and spallart allarmus also work well for certain flows.

What type of flow are you modelling, how much processor power and memory do you have, and what is your end goal?

  Reply With Quote

Old   August 19, 2001, 12:51
Default Re: Turbulence Model?
  #5
John C. Chien
Guest
 
Posts: n/a
(1). I think, you are right. (2).Using my definition of CFD, you will have to do "mathematical modeling". (3). And "Modeling" is not "select an option". You will have to fool around with your problem and the corresponding model(ing). (4). So, you don't expect to get accurate results by just picking an option. (unless it has been modelled, fine tuned and validated for your problem)
  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
Wrong calculation of nut in the kOmegaSST turbulence model FelixL OpenFOAM Bugs 27 March 27, 2012 09:02
Low Reynolds k-epsilon model YJZ ANSYS 1 August 20, 2010 13:57
KOmega Turbulence model from wwwopenFOAMWikinet philippose OpenFOAM Running, Solving & CFD 30 August 4, 2010 10:26
Fan heater model: what turbulence source to use? andy20 CFX 7 March 3, 2008 17:42
SSG Reynolds Turbulence Model Georges CFX 1 February 28, 2007 17:15


All times are GMT -4. The time now is 16:51.