CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

near wall first node

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

LinkBack Thread Tools Display Modes
Old   February 4, 2006, 09:01
Default near wall first node
Posts: n/a
Hi, I am studying numerical wind tunnel of atmospheric boundary layer. the ground roughness length is 1.05m, and the Reynoldy no. is 7*10^6.

According to the Y+ calculator, if y+ is assumed to 11.63 and 500, the distance of first grid is 0.4*10^-5~0.2*10^-3m. The grid is too small. Also, Fluent claims that the first node should be larger than the roughness height.

what is the problem? How can I do? Thanks
  Reply With Quote


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
Influece of wall velocity in the main flow marvin CFX 0 March 22, 2008 03:05
Convergence moving mesh lr103476 OpenFOAM Running, Solving & CFD 30 November 19, 2007 15:09
Deal with wall boundary with moving mesh by FVM? aiya Main CFD Forum 6 May 10, 2007 11:33
Wall functions? Pr Main CFD Forum 7 April 8, 2004 06:15
Quick Question - Wall Function D.Tandra Main CFD Forum 2 March 16, 2004 05:29

All times are GMT -4. The time now is 10:44.