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

modeling roughness

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 6, 2004, 10:05
Default modeling roughness
  #1
john
Guest
 
Posts: n/a
Hi all,

I'm doing an analysis on the effect of surface roughness on transition from laminar to turbulent flow past a spheroid body. When I run the same simulation with or without roughness hight of 1000,400,100,50 micron it seems I don't get any change of the results (pressure distribution, shearing stress etc).

further more the cells near the solid walls were higher than the roughness hight as requested in fluent user guide (Cs=0.5). I use a standard k-omega model for transitional flows.

Thanks in advance john
  Reply With Quote

Old   May 6, 2004, 12:00
Default Re: modeling roughness
  #2
optixxx
Guest
 
Posts: n/a
************************************************

Laminar flow you have no influence of roughness

y=64/RE is remember

optixxx
  Reply With Quote

Reply

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 05:57
nutRoughWallFunction and Surface Roughness Documented AlanR OpenFOAM 46 January 18, 2012 10:45
NACA standart roughness DAK565656 Main CFD Forum 2 August 24, 2005 00:47
Modeling Flow/Saturation/Absorption in Fibers Gene Dougherty Main CFD Forum 0 June 6, 2003 14:49
Roughness adaptation in CFX 4.4 Bart CFX 1 May 2, 2003 08:32


All times are GMT -4. The time now is 09:09.