|February 27, 2011, 13:26||
How to set up rough wall conditions
Join Date: Jan 2011
Posts: 9Rep Power: 4
i have created a tube D=0,2m, and use the k-Omega SST Model with All y+ treatment, y+ is around 25.
i set up the wall conditions in regions as rough, and there is a difference to smooth wall in the pressure drop (over to section planes i have created) but i cant manipulate the Roughness function as i want.
i mean the pressure drop with roughness height 0.0001 is the same as 0.01... 1.... 10... 100.
What does this roughness height stand for? and is there any mistake if have done in meshing/physic model or something?
thx for your help
best wishes weigsi
|February 28, 2011, 09:09||
Join Date: Mar 2009
Location: Sao Paulo, Brazil
Posts: 80Rep Power: 6
Itīs not just the roughness value, it depends of the first layer size.
See in the user guide, there is an explanation of how the wall treatment curve is adjusted depending on the roughness value....
|Thread||Thread Starter||Forum||Replies||Last Post|
|Wind turbine simulation||Saturn||CFX||23||April 16, 2011 07:34|
|Heat flux and k-e wall boundary conditions||Blob||CFX||4||June 8, 2009 05:10|
|k-w SST model wall conditions||Sheila||CD-adapco||4||March 12, 2005 03:55|
|Multicomponent fluid||Andrea||CFX||2||October 11, 2004 05:12|
|what the result is negatif pressure at inlet||chong chee nan||FLUENT||0||December 29, 2001 05:13|