CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Are there more FLUENT Turbulence Models?

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

LinkBack Thread Tools Display Modes
Old   December 26, 2008, 00:00
Default Are there more FLUENT Turbulence Models?
Posts: n/a
I'm wondering if anyone has implemented additional user-defined turbulence models in FLUENT? I'm specifically interested in finding (or possibly writing) a curvature-corrected Spalart-Allmaras model. I'd really appreciate everyone's two cents on user-defined turbulence models, and if anyone's willing to share one they've written, it would help me get started! Thanks

PS: I posted this once before, but didn't get any responses despite 40+ hits. I was hoping I might get better luck the second time around.
  Reply With Quote

Old   December 26, 2008, 15:25
Default Re: Are there more FLUENT Turbulence Models?
Posts: n/a
try to find example in user guide udf
  Reply With Quote

Old   December 26, 2008, 21:45
Default Re: Are there more FLUENT Turbulence Models?
Posts: n/a
I did... thanks for the thought but that was the first place I looked.
  Reply With Quote

Old   December 30, 2008, 02:45
Default Re: Are there more FLUENT Turbulence Models?
Posts: n/a
Hi, I'm no expert at turbulence modelling, even worse at using UDF to modify them. But you may want to consider changing/modifying the values of the constants of the SA model before going into using UDF. If you look up the documentation, you can see where the constants are being used. You may be able to modify any of these constants to give you the effects of your modified model, without having to write a UDF (which can get nasty!!)

If you really need to use a UDF, you can create your own Turbulent Viscosity equation using the Define_Turbulent_Viscosity macro. If you just want to modify the production and dissipation values, you can use the Define_Source macro.

Hope that helps.
  Reply With Quote


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
Additional turbulence models for FLUENT Travis FLUENT 0 December 19, 2008 12:58
LRN-ke turbulence model(other than Fluent 6 models Wael FLUENT 0 October 17, 2005 04:03
Low-Re turbulence models in Fluent 6.0 Iason Hatzitheodorou FLUENT 3 July 8, 2004 11:48
turbulence models rafal Main CFD Forum 3 April 26, 2004 11:27
LRN turbulence models in Fluent Luo Shengping FLUENT 6 December 22, 2000 10:59

All times are GMT -4. The time now is 08:33.