|July 2, 2007, 06:04||
Hey all, for a turbulence s
for a turbulence simulation using the k-epsilon model I also have to consider wall functions. Comparing the pitzDaily example with simulations of cfx a strange difference at the upper wall (where the wall distance is reducing again) appeared. In the simulation with openFoam the the velocity near the wall was about 50% of the inflow, in contrast to cfx where the velocity was almost zero in that area.
One point I recognized is that the steady state solutions of cfx and of differ and cfx seems to stop much earlier. But after all I think the difference at the upper wall is also due to the wall functions. I've read that OF uses the nu_T wall function, in contrast to cfx which uses scalable wall functions. First, is there a big difference between both and second can I find more information about the wall functions used in OF? Is there a way to use almost the same wall functions?
|Thread||Thread Starter||Forum||Replies||Last Post|
|wall functions near slanting wall||Pankaj||Main CFD Forum||0||September 11, 2008 10:50|
|LES with wall functions, wall boundary, Re 10000||subba||CFX||4||July 10, 2007 06:04|
|Wall Functions||adam||OpenFOAM Running, Solving & CFD||2||August 31, 2006 10:18|
|damping functions(wall functions)||Pr||Main CFD Forum||0||March 22, 2004 03:17|
|abt near wall turbulence wall functions||amv||Main CFD Forum||0||May 12, 2003 04:38|