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

determine wall-shear-stress

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 11, 2007, 05:59
Default determine wall-shear-stress
  #1
Joeblue
Guest
 
Posts: n/a
Hello, I'm trying to model a simple pipe. In this pipe is flowing water (ca. 2,0 m/s). In purpose to determine the Wall-shear-sress in high precision, I chose the Y+= 1. The solutions (Fluent 3) show that the values of Wall-shear-stress calculated by a grid with Y+=1 are much more discontinuous then values calculated by a grid with Y+=50. I think I did a mistake by building the grid (Gambit) or do the settings in Fluent. Is there something I have to consider while creating the grid (I used a B-layer with 4 rows )? How can I choose the settings in Fluent that the solver is able to calculate the Wss with high precision?

sincerely

  Reply With Quote

Old   July 11, 2007, 06:36
Default Re: determine wall-shear-stress
  #2
Joeblue
Guest
 
Posts: n/a
Sorry there's a mistake: it's Fluent 6
  Reply With Quote

Old   July 11, 2007, 12:50
Default Re: determine wall-shear-stress
  #3
Joe
Guest
 
Posts: n/a
If you are resolving the BL directly you need to use a turbulence model with compatible wall treatment.
  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
Water subcooled boiling Attesz CFX 7 January 5, 2013 04:32
Wall Shear Stress GamFlu FLUENT 0 June 11, 2011 03:52
relationship between wall shear stress and TKE winter FLUENT 0 December 11, 2007 18:11
Re: About wall shear stress Mike FLUENT 9 November 17, 2003 15:41
wall shear stress lingo FLUENT 2 June 2, 2003 03:40


All times are GMT -4. The time now is 20:58.