|December 6, 2005, 23:09||
Reynolds Stress model in CFX vs Fluent
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
|October 7, 2009, 06:19||
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 12,973Rep Power: 100
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.
|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 10:37|
|Advanced Turbulence Modeling in Fluent, Realizable k-epsilon Model||Jonas Larsson||FLUENT||5||March 13, 2000 04:27|