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

Symmetry plane for LES in channel

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 10, 2009, 04:59
Default Symmetry plane for LES in channel
  #1
Flo
Guest
 
Posts: n/a
Hi,

is it possible to use a symmetry boundary for a plane channel LES calculation on the sides or does it influence the development of the flow too much? Would be nice, if someone has an explanation.

Flo
  Reply With Quote

Old   March 10, 2009, 06:59
Default Re: Symmetry plane for LES in channel
  #2
Julien
Guest
 
Posts: n/a
A symmetry plane in this case would essentially act like an inviscid wall. So, the velocity perturbations normal to this boundary will be zero and there will be a region near it where these perturbations ramp up to the expected value. I suppose if the length of your domain in this direction is big enough so that you see a flat region in the boundary-normal velocity perturbation rms and sample for statistics there then you are ok. Why not use periodicity?

  Reply With Quote

Old   March 12, 2009, 04:41
Default Re: Symmetry plane for LES in channel
  #3
Flo
Guest
 
Posts: n/a
Thanks for the explanation! Flo
  Reply With Quote

Old   March 12, 2009, 12:40
Default Re: Symmetry plane for LES in channel
  #4
Joe
Guest
 
Posts: n/a
You are artificially restricting your flow in the spanwise direction. You have essentially halved the width of your channel. I don't think this is a good idea. In a real flow, the turbulent eddies would be free to cross this plane, so by restricting them you are altering the physics.
  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
Poor Residuals at Intersection Between Symmetry Plane and Airfoil Leading Edge TWaung CFX 2 February 16, 2010 09:11
Symmetry plane help! (with schematic) Nate CD-adapco 1 October 11, 2007 10:46
Symmetry plane error in solver Santiago Orrego. CFX 6 January 31, 2007 08:09
ICEM and symmetry plane Roland CFX 3 September 13, 2006 08:38
Symmetry plane and force calculation Roland CFX 7 May 31, 2006 13:34


All times are GMT -4. The time now is 16:27.