CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Tube Wall - Roughness Coefficients

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

LinkBack Thread Tools Display Modes
Old   November 23, 2011, 11:00
Default Tube Wall - Roughness Coefficients
Ronald A. Lau
Join Date: Jul 2009
Location: Chicago
Posts: 30
Rep Power: 10
ronaldalau is on a distinguished road
Send a message via Skype™ to ronaldalau
We currently model the exterior of tube walls (the boundary of our model) that look like this: flat walls without a boundary layer mesh. (Can['t do it anyother way due to limited computing and time resources.)

The mesh height on the walls is 8" to 12", and the tubes are 2-1/2" OD (R1-1/4")

Does anyone have any experience on the best Roughness Height and Roughness Coefficient to use for this situation? Radiation is dominant, but Convection and Conduction are not negligible.


ronaldalau is offline   Reply With Quote


bcs, walls

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
Laminar flow and wall roughness junbbung FLUENT 1 December 2, 2012 06:57
[ICEM] Export ICEM mesh to Gambit / Fluent romekr ANSYS Meshing & Geometry 1 November 26, 2011 13:11
[ANSYS Meshing] Mesh near a Tube Wall dominizi ANSYS Meshing & Geometry 1 November 16, 2011 19:49
UDF for wall slipping HFLUENT Fluent UDF and Scheme Programming 0 April 27, 2011 12:03
Wall roughness ruedavallejo OpenFOAM Running, Solving & CFD 2 April 17, 2009 00:10

All times are GMT -4. The time now is 00:06.