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   April 2, 2004, 18:56
Default LES using FLUENT
Posts: n/a
I am a little confused while running LES simulations using FLUENT. I am simulating Incompressible Impinging Jets. Just looking into velocity and pressure profiles and vortex generation.

1) First I run the simulation for a certain number of iterations to get statistically steady flow.

2) Then I use command solve/initialize/init-flow-statistics to zero initial statistics.

3) Then I enable Data Sampling for Time Statistics in the iterate panel.

My questions are as follows?

A)Is that the correct way to run LES in Fluent? Else please let me know if I am doing something wrong. Because in an example problem by Fluent, I saw they did not perform step 2 and went straight to step 3.

B)Also what is my criterion for selecting time step when I am running the implicit scheme? For explicit schemes, we generally resort to CFD criteria.

C)Which solver gives better results segregated or coupled ?

D) Though PISO is recommended for transient flows, it takes a lot of time. Is it ok to use SIMPLE?

E) For momentum discretization, I am using Central Diff. Is 2nd Order Upwind better?

F) Is there some tutorial using LES in FLUENT, other than the Acoustics one?

Thanks for your help.



  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
Postprocessing of LES data in FLUENT anee FLUENT 0 September 27, 2011 01:10
LES and near wall treatment approach in Fluent khosro1355 Main CFD Forum 1 July 10, 2009 10:49
LES in fluent Sham FLUENT 0 August 1, 2007 21:31
LES using FLUENT sarah_ron FLUENT 7 October 22, 2004 17:36
LES with Fluent sat FLUENT 0 August 2, 2004 18:32

All times are GMT -4. The time now is 22:05.