I get some materials which show some cases using LES, but when i do it ,i find that i cannt use LES for 2D problems.Dear friends, please give some advices how to solve 2D problems using LES by FLUENT software?

see the previous posts, there are some discussions on this topic

there is a way to activate 2d les, i have forgotten the command and unable to find it.

This is how you can activate 2d les, (on command prompt)

(rpsetvar 'les-2d? #t)

I have the same question.you say use (rpsetvar 'les-2d? #t) , I hade down, but it can run.The console present " invalid command [rpsetvar]" sorry ,I'm chinese, my english ability is poor.

dear zxaar, Thank you for your answer. I try it again .It do can run. Now I can run les-2d.

dear friend Im interesting in simulation of Aero-Acoustics noise using LES turbulent model. If you have any tutorials related to this topic please send it to me

Dear Friend you are really in bad luck, because how to enable 2d les i could find out from a 'Aero-Acoustics noise using LES ' tutorial. And due to hard disk crash I lost all the data relevant to fluent tutorials and other docs. So i can not mail you that. But if you try to search the fluent tutorials of version 6.18 or before you might get that tutorial. More than this I am afraid I can not do.

dear zxaar thanks for replay i will try search the internet

Dear Friends,Could tell me how to run in detail? I tried but failed. i don't know how to run (in FLUENT 6) Really. thx!!

its easy: start fluent 2d

go to command prompt of fluent and type letter by letter (exactly with () ):

(rpsetvar 'les-2d? #t)

it should work, i have done it many times.

Thank you very much!!it works!!so can you tell me why it happens or what else can happen by the way?

we did not do nothing much:

look at the command

(rpsetvar 'les-2d? #t)

rpsetvar is scheme command for setting a value of a variable, we set the value of variable les-2d to t or true.

or in other words we enable the les-2d, using the command in () is syntax of fluent. By the same way you can enable lot of things, if you want to explore it, there is a way to do it,

take a very small mesh , may be 100 cells odd, setup a case and save the case as ascii from fluent.

open that case file on word pad, you can figure out lot of such variables doing lot of stuff.

try it, i learnt a lot from it