CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

validation LES Simulation

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 29, 2010, 17:12
Default validation LES Simulation
  #1
s&m
New Member
 
Join Date: Apr 2009
Posts: 14
Rep Power: 16
s&m is on a distinguished road
Hi to everyone!
Finally i created a simulation of a flow around a cylinder, and it's works fine!! The Von Karman vortex begins around 5 seconds, (as predicted by Strouhal number)

However I would like to understand if the results are right. I've listened that, for conferming the results, a general way for LES model is to calculate the ratio between the total turbulent Kinetic energy, and the Subgrid Turbulent kinetic energy, and the value have to be between 0.8 and 1. I would like to calculate this ratio, but i don't know how to do it.. because from the simulation we obtain only the sGs Kinetic energy.
The total K. E. = filtered K E + sGs K E.
and the filtered K E= 0.5 (filtered velocity)i (filtered velocity)i
so how to obtain filtered K E? how do i calculate these terms (inside paraview)?

the mean value (p and U) are time averaged right?
thx to everybody!
s&m is offline   Reply With Quote

Reply


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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
LES simulation of bluff body at Re(d)=1200 arash_nl FLUENT 0 June 1, 2009 13:16
FSI TWO-WAY SIMULATION Smagmon CFX 1 March 6, 2009 13:24
LES simulation of sonic jet Jianping Main CFD Forum 0 January 21, 2005 05:52
LES on two phase flow Li Yang Main CFD Forum 0 May 12, 2004 08:10
Some Questions about LES. Bin Li Main CFD Forum 2 February 20, 2004 09:58


All times are GMT -4. The time now is 19:52.