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-   -   2D Large Eddy Simulation with fluent? (http://www.cfd-online.com/Forums/fluent/34012-2d-large-eddy-simulation-fluent.html)

Barry Cole June 21, 2004 01:12

2D Large Eddy Simulation with fluent?
 
Hi Can fluent solve the 2d Flitered NS (Large Eddy Simulation) equations?

Also if fluent doesn't offer 2d LES capablitites can anyone sutggest a COMERCIAL code that does.

Thanks in advance

Jonas Larsson June 21, 2004 02:36

Re: 2D Large Eddy Simulation with fluent?
 
Yes, fluent can run the LES model in 2D. However, it doesn't make much sence to do this. LES = Large Eddy Simulation = resolving the large scale turbulent eddies. These large-scale turbulent eddies are 3D by nature and if you run 2D you will not resolve them. Hence, a 2D LES simulation is not going to produce anything physical. It is just a numerical exercise that you might want to do to debug your code or something.

Barry Cole June 21, 2004 02:39

Re: 2D Large Eddy Simulation with fluent?
 
Ok Thanks

anil_samale April 26, 2011 09:43

Les-2d
 
Hi Jonhson,

As if you say running LES for 2D is just an numerical excersize then while soving flow over cylinder by LES Model gives different results than K-epsilon.. I means LES model gives close results...though large eddies are absent or 3d in nature....can you please give some idea of same. Since I am trying to solve flow over cylinder...

pitamber.methia October 2, 2013 13:36

use command (rpsetvar 'les-2d? #t)
LES will come in models option
LES is used for axis-symmetric geometries only


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