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

How ot deal with "Enhanced Wall Function"

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 19, 2003, 04:49
Default How ot deal with "Enhanced Wall Function"
  #1
winall
Guest
 
Posts: n/a
hello~~~~is there anybody who has used "Enhanced Wall Function" before?? i want to use this, but don't know how to deal with it, i read help, but it doesn't help. So i want to know if u can help me!

3x
  Reply With Quote

Old   June 19, 2003, 06:34
Default Re: How ot deal with "Enhanced Wall Function"
  #2
mateus
Guest
 
Posts: n/a
Hi!

Enhanced wall function is used if you have some significant phenomenon occuring inside boundary layer (for example back flow). What you have to be carefull about is that you mesh boundary layer region - you need at least 10 (better more) cells inside (y+ should be aproximatelly 1). The problem is that you will get a really big mesh this way and your simulation will be much slower because of that. Think twice before using this aproach - you may not need it at all.

regards MATEUS
  Reply With Quote

Old   June 20, 2003, 13:11
Default Re: How ot deal with "Enhanced Wall Function"
  #3
ap
Guest
 
Posts: n/a
If you really need the enhanced wall function approach, try to apply a boundary layer when you generate your mesh in Gambit instead of generating a finer mesh everywhere. This will reduce the number of cells and nodes in your domain.

If your domain is not too complex, you can also try to use a hex mesh, which usually requires a lower number of nodes if compared to thetrahedral meshes.

FLUENT also provide you the y+ adaption tool, which can be of some help, but I think it's better to create the proper mesh directly in Gambit.

Hi

ap
  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
UDF to Access Wall Normal Concentration Gradient Daniel Tanner Fluent UDF and Scheme Programming 4 February 18, 2015 15:35
Tomiyama wall lubrication force Edy OpenFOAM 10 December 13, 2010 12:41
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
Wall functions Abhijit Tilak Main CFD Forum 6 February 5, 1999 02:16


All times are GMT -4. The time now is 20:40.