CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

Scalable Wallfunction

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

LinkBack Thread Tools Display Modes
Old   January 7, 2010, 11:46
Default Scalable Wallfunction
New Member
Benedikt Flurl
Join Date: Jan 2010
Posts: 1
Rep Power: 0
dontknow is on a distinguished road
Hi Everybody,

I have a question concerning the Scalable Wallfunction Approach presented by Grotjans and Menter: "Wall functions for General Application CFD Codes".
CFX uses this wallfunction for the standard ke- and kw- turbulence-modells. This approach shifts the viscous sublayer edge towards the wall and yields (reported in the paper and in the dissertation by Grotjans, and if calculating with CFX) very reasonable and good results in a y+-range from 1 up to 500. I am always very fascinated how stable CFX runs with this approach and also tried to implement it in a small code for my own. This approach does not only limit the minimum y+-value to around 11.06, like often discussed here in the forum, but there are also differently adopted boundary conditions for the epsilon-equation (Neumann-type) and the momentum-equations compared to the standwallfunction-implementations like I could also find in OpenFoam.
Has anybody implemented the Grotjans-approach successfully, I don't get my implementation stable and the results are far away from the ones I get with the standard-wall function approach. I think there is no implementation of this approach in OpenFoam, is it?! For reformulated flux-boundary-condition in the epsilon-equation in the above mentioned paper a calibration-function is given without values, has anybody found out anything about these values?

Thank you very much for your help...
dontknow is offline   Reply With Quote


grotjans, scalable, turbulence, wallfunction

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
scalable wall functions? Aek Disoyuk FLUENT 0 June 8, 2006 04:58
2ph-Masstransfer and wallfunction at walls? Joachim Hülstrung Phoenics 0 January 2, 2002 20:29
Scalable wall functions. J. Keays CFX 3 September 18, 2001 07:58
Torque calculations. J. Keays CFX 21 July 12, 2001 09:03

All times are GMT -4. The time now is 22:34.