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

Wall function for velocity?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 10, 2011, 09:50
Default Wall function for velocity?
  #1
New Member
 
Join Date: Feb 2011
Posts: 2
Rep Power: 0
johnblund is on a distinguished road
Hi,

I am modeling atmospheric flows using a standard KE model. I have had some problems reproducing earlier results from e.g Hargreaves and Wright (2006) and Blocken et.al (2007)

I am sure that the differences are caused by different wall functions being applied, as I am sure inlet profiles are correct.

I have identified the wall functions used for k and epsilon (kqRWallFunctionFvPatchFIeld.C and epsilonWallFunctionFvPatchField.C), but I cannot find the wall function for velocity.

I want to make sure that the velocity is set according to the logarithmic law in the wall adjacent cells. I am only able to see that it is set to zero at the wall in the 0/U-file.

Does anyone know how the velocity is set in the wall-adjacent cells? And an easy way of defining a wall function for velocity close to the wall if it does not exist allready.

kind regads
John
johnblund is offline   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
channelFoam for a 3D pipe AlmostSurelyRob OpenFOAM 3 June 24, 2011 13:06
ParaView for OF-1.6-ext Chrisi1984 OpenFOAM Installation 0 December 31, 2010 07:42
Need some wall function approaches! yka8150 Main CFD Forum 0 September 21, 2009 23:08
Droplet Evaporation Christian Main CFD Forum 2 February 27, 2007 07:27
Wall function tod Phoenics 1 May 19, 2003 05:05


All times are GMT -4. The time now is 15:17.