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

Decay of turbulence intensity in SST transitional model

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 10, 2012, 07:51
Default Decay of turbulence intensity in SST transitional model
  #1
Senior Member
 
Nick
Join Date: Nov 2010
Posts: 120
Rep Power: 6
Nick R is on a distinguished road
Hi all,


I was wondering if you've had any experience with the SST transitional model (gamma theta) in Fluent. I am using the model for flow over a wing but I am struggling with setting up the correct turbulence BCs to get the intensity of about 0.8% near the leading edge of the wing. I have done some trial and error to no avail. What puzzles me is that when I set Tu at 5%, in the solution the Tu contour plot shows values much higher in the region near the inlet where the Tu was set to 5%. I'd appreciate any rules of thumb (provided they exist) to estimate the viscosity ratio and Tu at inlet.


Regards,
Nick
Nick R is offline   Reply With Quote

Old   April 17, 2014, 17:54
Default
  #2
New Member
 
Robbie
Join Date: Apr 2014
Posts: 1
Rep Power: 0
rstewart is on a distinguished road
Did you ever have any luck resolving this issue?

I am having a similar problem, and my turbulence intensity is actually increasing when I am expecting it to decay.
rstewart is offline   Reply With Quote

Old   April 17, 2014, 22:15
Default
  #3
Senior Member
 
Nick
Join Date: Nov 2010
Posts: 120
Rep Power: 6
Nick R is on a distinguished road
I ended up using CFX instead which resolved my issues.
Nick R is offline   Reply With Quote

Reply

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
boundary and initial condition for SST k-omga turbulence model mb.pejvak Main CFD Forum 3 May 1, 2012 20:06
Low Reynolds k-epsilon model YJZ ANSYS 1 August 20, 2010 13:57
K-Omega SST Turbulence Model nvtrieu STAR-CCM+ 3 July 21, 2010 05:05
SST / turbulence model PCFD ANSYS 8 July 13, 2010 16:28
Discussion: Reason of Turbulence!! Wen Long Main CFD Forum 3 May 15, 2009 09:52


All times are GMT -4. The time now is 02:50.