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

Performance of k-omega in low Re flows

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 30, 2016, 19:43
Default Performance of k-omega in low Re flows
  #1
Member
 
RacMat
Join Date: Jan 2013
Posts: 77
Rep Power: 10
rvl565 is on a distinguished road
Hi,

I have been simulating low Re flows ( ReTheta ~ 2500 ) over a ZPG flat plate. I saw that neither the k-omega nor the SST (in OpenFOAM) is able to give the correct log law profile nor the correct Cf. Has anyone seen this before? Are there any references that discuss this behaviour of the models?
I just wanted to check if I am doing something wrong!
I have tried the two different boundary conditions : the default wilcox omega boundary condition with the 6 *() and the one suggested by menter 60*() for both the models.

Thanks!
rvl565 is offline   Reply With Quote

Old   June 10, 2016, 03:53
Default
  #2
Member
 
RacMat
Join Date: Jan 2013
Posts: 77
Rep Power: 10
rvl565 is on a distinguished road
my bad, somehow i didnt have the correct y+ :P
rvl565 is offline   Reply With Quote

Old   June 17, 2016, 13:20
Default fully turbulent?
  #3
Member
 
Alberto
Join Date: Sep 2013
Posts: 37
Rep Power: 10
malv83 is on a distinguished road
Are you using the fully turbulent models? because you should try transitional models. " Prediction of transitional and fully turbulent flow using an alternative to the laminar kinetic energy approach" is a very good transitional model
malv83 is offline   Reply With Quote

Reply

Tags
flat plate, komega, komegasst, low re flows, zpg

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
low Mach compressible flows venkataramana OpenFOAM 9 February 22, 2019 04:52
how to calculate the omega at inlet boundary in k omega sst Scabbard OpenFOAM Running, Solving & CFD 2 September 30, 2014 13:06
problem from k epsilon to k omega NJG OpenFOAM Running, Solving & CFD 0 April 15, 2013 08:24
"Glitches" in k and omega buffi OpenFOAM Running, Solving & CFD 8 January 29, 2013 03:57
Low Re number flows Wu Chun-Kai Main CFD Forum 17 July 1, 1999 20:24


All times are GMT -4. The time now is 05:12.