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

DES ( SA+LES) vs DES ( kwSST+LES) for bluff body

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 8, 2008, 09:04
Default DES ( SA+LES) vs DES ( kwSST+LES) for bluff body
  #1
Phil
Guest
 
Posts: n/a
flow separation / vortex shedding.

Does anyone have any experiance with the accuracy of flow separation prediction when using SA for the URANS portion of DES vs. using kw SST for the URANS portion of DES?

My understanding is that the kw SST generally performs well in separation for pure URANS problems.

Does anyone have experience on the separation prediction performance of SA vs kw SST in a DES situation?

I would have guessed that since separation must initiate in the URANS portion of the domain the kw SST model would be preferable?

As it is CFX's DES model which uses kw SST is hopelessly over predicting mu_turb in my low Reynolds number shedding case which is supressing all vortex shedding. I am hence thinking of trying the case with Fluent which gives both options for the URANS portion of the DES model (SA and kw SST).

Thank you.
  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
LES and DES models for wind turbine mohammad Main CFD Forum 6 April 30, 2011 22:01
LES or DES in wind turbine mohammad CFX 2 April 19, 2011 22:16
Spanwise Length and Grid Refinement for SAS-SST, DES, and LES Josh CFX 5 October 14, 2010 19:47
LES simulation of bluff body at Re(d)=1200 arash_nl FLUENT 0 June 1, 2009 13:16
How to use DES well? Daniel Main CFD Forum 0 October 26, 2008 05:59


All times are GMT -4. The time now is 08:37.