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

LES combustion problem

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 28, 2003, 09:52
Default LES combustion problem
  #1
Salvador
Guest
 
Posts: n/a
I am modelling non-premixed turbulent flames using LES. I am systematically obtaining a much smaller jet penetration than experiments or RANS solutions. I even obtained it starting from a "correct" k-e solution. I have tried several combustion models and the problems persist. (it also happens when I test a pure mixing case with a prescribed density distribution in mixture fraction space) I think is related to the relatively coarse grid used that introduced a lot of numerical diffusion. However, some people suggest me that incorrect incoming turbulent BC can be the cause. Any ideas/suggestions around there?
  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
convergence problem when use pisoFoam, LES for wind tunnel case Forrest_Lei OpenFOAM 3 July 19, 2011 06:00
Problem with handling LES modeling with dynamic mesh g.akbari OpenFOAM Running, Solving & CFD 0 March 8, 2010 17:18
Combustion Problem Arnab CD-adapco 2 April 29, 2009 08:13
Problem in solving combustion simulation Ramesh FLUENT 0 June 2, 2006 12:21
Combustion: pool fire problem Jonathan CFX 2 October 27, 2003 12:49


All times are GMT -4. The time now is 08:42.