CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

Reynolds Stress model in CFX vs Fluent

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 6, 2005, 23:09
Default Reynolds Stress model in CFX vs Fluent
  #1
Tim
Guest
 
Posts: n/a
Hi.. I currently have access to both CFX & Fluent 6. I've done some simulation in CFX5.7.1 before and wish to compare the same model in Fluent. CFX5.7.1 has a range of Reynodls Stress Model:

1.SSG model developed by Speziale,Sarkar & Gatski,

2.LRR-IP (isotropisation for production) & -QI (Quasi-Isotropic) developed by Launder,Reece & Rodi

3.Baseline omega model

4.omega-Reynolds Stress model

From what I read from Fluent manual, Reynolds stress model used in Fluent 6 is developed by Gibson & Launder, Launder, and Launder et al.

Does anyone know if Fluent's RST model is the same as LRR-IP or LRR-QI used in CFX? I notice that in Fluent the constant Ce1=1.44,Ce2=1.92,C_mu=0.09 etc... whie in CFX the constant Ce1=1.45,Ce2=1.9,C_mu=0.1152 etc for LRR-IP... Are they the same model?

Thanks for your information. Cheers,Tim

  Reply With Quote

Old   October 7, 2009, 07:19
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,869
Rep Power: 144
ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
I don't know the details of the RSM models, all I can suggest is you compare the constants and modelled equations and check they are the same.

Don't forget that the numerics of Fluent and CFX are very different so even if the model is the same it would not surprise me to get quite different results.
ghorrocks is offline   Reply With Quote

Reply

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
Problem importing watertight model into CFX djk1301 ANSYS 3 February 1, 2011 23:04
solving ocean wave with Fluent or CFX? gholamghar Main CFD Forum 1 March 21, 2009 13:49
reynolds stress in k-e model ayapan FLUENT 3 December 23, 2005 14:49
How to get Reynolds Stress from Fluent avant FLUENT 0 October 7, 2005 11:37
Advanced Turbulence Modeling in Fluent, Realizable k-epsilon Model Jonas Larsson FLUENT 5 March 13, 2000 04:27


All times are GMT -4. The time now is 20:27.