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

Employ wall-function just for a certain walls

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

Like Tree1Likes
  • 1 Post By Far

Reply
 
LinkBack Thread Tools Display Modes
Old   April 4, 2013, 11:22
Default Employ wall-function just for a certain walls
  #1
Senior Member
 
Astio Lamar
Join Date: May 2012
Location: Pipe
Posts: 154
Rep Power: 5
asal is on a distinguished road
Hi!

I want to know if it is possible in the fluent to employ wall function just for a certain walls and not for the all. I think there is something with enhanced wall function, but I'm not sure.
This is very useful when there are some walls with the fine mesh and some other with the course mesh using wall function.
asal is offline   Reply With Quote

Old   April 4, 2013, 14:23
Default
  #2
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,915
Blog Entries: 6
Rep Power: 38
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
Yes it is ehnanced wall treatment.
Far is offline   Reply With Quote

Old   April 4, 2013, 15:12
Default
  #3
Senior Member
 
Astio Lamar
Join Date: May 2012
Location: Pipe
Posts: 154
Rep Power: 5
asal is on a distinguished road
Hi!

Then how its work? can we have any control on it to impose wall function to the certain walls, or it is done by FLUENT? Can we change the condition of its blending function?
What is the maximum Y+ acceptable by using wall function?
thx!
asal is offline   Reply With Quote

Old   April 4, 2013, 15:40
Default
  #4
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,915
Blog Entries: 6
Rep Power: 38
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
It is done by Fluent. Yes you can you change blending function through UDF I guess.

Essentially for Y+ < 5 it employs integration to wall approach. For Y+ >30 it uses pure wall function. In buffer zone it uses blending function.
asal likes this.
Far 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
Compile problem ivanyao OpenFOAM Running, Solving & CFD 1 October 12, 2012 09:31
[ICEM] Export ICEM mesh to Gambit / Fluent romekr ANSYS Meshing & Geometry 1 November 26, 2011 13:11
channelFoam for a 3D pipe AlmostSurelyRob OpenFOAM 3 June 24, 2011 13:06
Use wall function on some walls (not all walls) Mahdi10 FLUENT 1 February 16, 2009 12:52
Quick Question - Wall Function D.Tandra Main CFD Forum 2 March 16, 2004 05:29


All times are GMT -4. The time now is 06:43.