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

Numerical Implementation of LES Wall models

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

LinkBack Thread Tools Display Modes
Old   March 3, 2005, 22:47
Default Numerical Implementation of LES Wall models
Posts: n/a
hi,all! I am new to LES programming,I hope that someone can help me the following questions.

1)Must all LES use wall models? why?

2)Is there any difference between the k-epsi wall functions and LES wall Models? What is it?

3)What is the most easy-to-implement and efficient wall models in LES? How is it numerically implemented? Since I lack the programming experience, the details of numerical implementation is very important for me.

Any comment or some reference is greatly appreciated, thanks

  Reply With Quote

Old   March 4, 2005, 10:03
Default Re: Numerical Implementation of LES Wall models
Posts: n/a
1) No.

2) Yes. The part of the unsteady motion modelled by the two approaches is different.

3) Easiest to implement is placing the first grid point at y+ < 1. Most efficient depends on the dominant physics of what is being simulated.

Describing numerical implementations on a forum such as this is not practical. I would suggest looking at other peoples LES code, reading early LES papers from the 60s and 70s or reading detailed LES reports such as internal reports and PhD theses.
  Reply With Quote

Old   March 14, 2005, 01:53
Default Re: Numerical Implementation of LES Wall models
Posts: n/a
Andy, can you tell me some details about getting such report or thesis through net (address)
  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
LES - Wall Functions agg Main CFD Forum 5 May 13, 2005 12:30
Implementation of wall function with SA model Bala Main CFD Forum 0 October 7, 2004 23:54
LES wall functions barrat Main CFD Forum 10 September 1, 2004 08:29
Wall layer models roadracer Main CFD Forum 0 September 25, 2002 11:57
Wall functions Abhijit Tilak Main CFD Forum 6 February 5, 1999 02:16

All times are GMT -4. The time now is 15:04.