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

LES- first grid point in boundary layer, y+

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 3, 2011, 10:26
Default First grid point in boundary layer, y+
  #1
New Member
 
sina
Join Date: Mar 2009
Posts: 1
Rep Power: 0
sina is on a distinguished road
Hey all,

I am going to perform a LES of turbulent channel flow.

would anybody please give me some idea of how fine the grid need to be. Somebody says you should resolve the boundary layer with at least 10 points across it, and with the first grid point at a position of approximately y+ = 1.

Given the definition of y+, how would you evaluate the frictional velocity (u*) which itself needs the shear stress at the wall?

Thanks.
Sinas

Last edited by sina; February 3, 2011 at 11:26.
sina is offline   Reply With Quote

Reply

Tags
les mesh yplus

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
How to set boundary layer of a moving body in GAMBIT to a mesh zone for dynamic mesh tomyangbath FLUENT 16 January 18, 2012 05:47
External Radiation Boundary Condition for Grid Interface CFD XUE FLUENT 0 July 9, 2010 02:53
strange error near boundary layer CF Main CFD Forum 0 November 2, 2007 01:13
How to mesh the 1st grid point? Daniel Main CFD Forum 1 October 8, 2007 02:27
Combustion Convergence problems Art Stretton Phoenics 5 April 2, 2002 05:59


All times are GMT -4. The time now is 16:36.