CFD Online Logo CFD Online URL
Home > Forums > FLUENT


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

LinkBack Thread Tools Display Modes
Old   August 12, 2005, 13:25
Default LES
Posts: n/a

i am performing a LES aerodynamic flow analysis analysis of passenger medium size car. i completed a steady state realizable K-e flow analysis of 100 iteration. now i am continuing my LES analysis from steady state results. i have used smagoriswky-lilly model and given 0.0003 secs as the time step. in residual plot i get an oscillating curve which is neither diverging nor converging. is this residual plot correct? have any of u performed such a analysis, maybe he/she can share his difficulties faced. since i am bit new to fluent can any one guide me how to make animation of the above analysis.

thanks and regards wilson
  Reply With Quote

Old   August 22, 2005, 15:35
Default Re: LES
Posts: n/a
If you chose an adequately small time-step size, the solution normally converges within 10 iterations each time step. So, try a smaller time-step size, let's say, 1e-4. If you're using 6.2, try the non-iterative time-advancement (NITA) scheme which can be selected in the "Define/Models/Solver" GUI panel.
  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
How to conduct transient LES simulation tianrenshui311 FLUENT 0 November 15, 2010 14:21
Turbulence dampening due to magnetic field in LES and RAS eelcovv OpenFOAM 0 June 8, 2010 11:35
LES grid mesh L3munoz Main CFD Forum 0 April 7, 2010 05:05
Differences between a laminar code and a les one ben Main CFD Forum 9 February 17, 2005 00:40
Some Questions about LES. Bin Li Main CFD Forum 2 February 20, 2004 10:58

All times are GMT -4. The time now is 09:30.