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

LES energy levels

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 7, 2004, 06:49
Default LES energy levels
  #1
Distanne
Guest
 
Posts: n/a
I have a really basic LES code. would any one be able to tell me how I can evaluate if my grid is fine enough.

how can I be sure that my cut-off is in the invariance energy range? what outputs of energy could I get from my code to help me know this?

any input would be great. thanks.
  Reply With Quote

Old   September 7, 2004, 07:49
Default Re: LES energy levels
  #2
Apurva
Guest
 
Posts: n/a
When solution has progressed a bit check your y+. Visit this site for viscous grid spacing calculation http://geolab.larc.nasa.gov/APPS/YPlus/

y+ value for les calculation should be less than 1 for LES.

Hope it helps
  Reply With Quote

Old   September 7, 2004, 08:39
Default Re: LES energy levels
  #3
Distanne
Guest
 
Posts: n/a
hi, thanks for your response.

i was thinking more about away from regions in an unconfined flow.

how can i be sure my filter width is in my invariant energy range?

thanks.
  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
How to obtain turbulent kinetic energy data from LES model of Ansys CFX? rsin CFX 10 October 13, 2014 09:24
LES and total turbulent kinetic energy Boerge FLUENT 1 September 8, 2012 11:41
LES of periodic pipe centerline turbulent kinetic energy smehdi609 OpenFOAM 0 December 1, 2010 00:59
ATTENTION! Reliability problems in CFX 5.7 Joseph CFX 14 April 20, 2010 15:45
energy spectra from LES simulations kumar OpenFOAM Post-Processing 0 October 29, 2009 10:42


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