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

SST models accoring to documentation

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 2, 2015, 14:00
Default SST models accoring to documentation
  #1
New Member
 
Hilde
Join Date: May 2014
Location: Copenhagen, Denmark
Posts: 18
Rep Power: 11
hilde is on a distinguished road
Dear all,
I am looking for the equations correlated to the SST model in the CFX 15.0 manual (the theory guide) but am afraid I am really confused about it all.

For the k-epsilon and k-omega I have found the actual equations in 2.2.2.1 2.2.2.4.1. respectively but under the section '2.2.2.6 The shear stress transport (SST)' there is simply no such equations.

There is however talk about the blending factor in 2.2.2.6.1. that I assume should be applied in the equations 2-48,49 (found in 2.2.2.5) which is the k-omega BSL model.

So, it is possibly so that the SST model is more or less the BSL model (Eq. 2-48,49) but with the eddy-viscosity limiter from 2.60? And that both the SST and BSL model shares the calculations of the blending factor F1?

Thanks in advance

Hilde
hilde is offline   Reply With Quote

Old   June 2, 2015, 22:30
Default
  #2
Senior Member
 
Join Date: Jun 2009
Posts: 1,788
Rep Power: 31
Opaque will become famous soon enough
You are on the right track.

SST differences respect to the BSL model also include turbulence production limiter, and else..
Opaque is offline   Reply With Quote

Old   June 3, 2015, 04:12
Default
  #3
New Member
 
Hilde
Join Date: May 2014
Location: Copenhagen, Denmark
Posts: 18
Rep Power: 11
hilde is on a distinguished road
Thank you very much for the answer Opaque

The documentation do describe a turbulence production limiter (2.2.2.7) and a curvature correction for the two-equation models (2.2.2..8), but as I understand it are these optional to use, and available in both the SST and the BSL model?

So, do you or anyone know if there is some other default difference between the SST and the BSL than the eddy-viscosity limiter? A difference that is not mentioned in the documentation or that I did not catch once reading it?

Thanks again
hilde 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
Mesh requirements for k-w models Jeremie84 FLUENT 5 June 13, 2014 10:49
Eddy viscosity hypothesis versus Reynolds stress models JuPa ANSYS 0 August 12, 2013 07:20
Error quantification for Hybrid LES models M_Tidswell CFX 0 April 8, 2013 09:17
Standard K Epsilon and Transitional SST models Robin FLUENT 1 January 17, 2010 19:06
CFD models Xie Main CFD Forum 0 April 18, 2002 14:48


All times are GMT -4. The time now is 20:38.