CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Wing tip vortices using Fluent

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

LinkBack Thread Tools Display Modes
Old   August 9, 2005, 05:22
Default Wing tip vortices using Fluent
Posts: n/a
Hi !

I am currently using Fluent (and Gridgen) to try to capture the wingtip vortices properly. I was wondering if you have any tips, references, or even websites concerning this study and particularly the choice of the turbulence model (am using Spalart but wish to try RSM, unfortunately this one does not want to converge).
  Reply With Quote

Old   August 9, 2005, 13:06
Default Re: Wing tip vortices using Fluent
Posts: n/a
A study made some time ago (I don't quite remember where I read this), revealed that increddibly, between S-A, Rke, SST-kw and RSM, for this problem you should always choose S-A or RSM. Rke and SST-kw were found to give much poorer results than the other 2. S-A was quite very close to RSM and both to experimental results.

Of course that S-A is much easier to converge, also because when your tip vortex will be shedding, RSM will very improbably be able to obtain a stationary solution and you will be forced to do a transient calculation. This is maybe the most common reason for difficult convergence with RSM (but people generally do not understand that RSM is sometimes too much physics for a stationary solution).

And another "tip": do not make a very dense mesh but rather adapt it by the gradient of pressure (you'll have to play a little with the limits) to capture the vortex path and the results will be more than satisfactory.

Best whishes, Razvan
  Reply With Quote

Old   August 10, 2005, 06:38
Default Re: Wing tip vortices using Fluent
Posts: n/a
  Reply With Quote

Old   August 22, 2005, 19:13
Default Re: Wing tip vortices using Fluent
Posts: n/a
There's a AIAA paper authored by the folks at Fluent Inc. Kim and Shin on the very same problem you described. Google it!
  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
Abaqus - Fluent Coupling WITHOUT MPCCI s.mishra FLUENT 1 April 5, 2016 06:47
Two questions on Fluent UDF Steven Fluent UDF and Scheme Programming 4 September 20, 2013 16:30
Wing Aerodynamics Fluent OF 15 comparison maddalena OpenFOAM Running, Solving & CFD 85 August 20, 2013 10:36
Fluent jobs through pbs ibnkureshi FLUENT 5 June 9, 2011 13:43
multi wing element - negative coefficient of drag? Zweeper FLUENT 10 March 11, 2010 13:20

All times are GMT -4. The time now is 17:23.