Su2 - les

rob777 · November 6, 2023, 10:21

Dear All,

could you please inform me about a method (if any exists) to run a LES with SU2?

Thank you

bigfootedrockmidget · November 6, 2023, 13:17

Hi,

Unfortunately there are currently no tutorials for LES. All configuration options are described in the file config_template.cfg and a quick search shows that these are probably the most important ones:

Code:

SOLVER= FEM_LES
KIND_SGS_MODEL= VREMAN

I am not so familiar with setting up an LES, I hope somebody else can add any missing info or hints.

A.Roy · November 6, 2023, 18:46

Hi Rob,

i don't claim to be an expert in LES (and especially not LES in SU2, I am wading through some DDES and hybrid RANS/LES stuff myself), but I'm linking below a SU2 conference slideshow with some commentary and results on general WMLES and DDES, but importantly for trying to learn how to run the cases, some settings and mesh guidelines also (particularly on slides 6 and 11).

While it discusses WMLES (and thus utilizes wall functions), I assume more deliberate mesh refinement and removal of the wall function setting would get closer to WRLES if that is what is required.

https://su2foundation.org/wp-content.../06/Molina.pdf

Apologies; you may already have this knowledge as you're asking about LES in the first place, but if anyone else browsing this is interested, I'm also linking a DLR paper on 2D RANS vs. Hybrid RANS/LES vs. WRLES for mesh and timestep guidance.

https://elib.dlr.de/136427/1/ELIB-Ei...rPublished.pdf

November 6, 2023, 10:21	Su2 - les	#1
rob777 New Member Join Date: Nov 2023 Posts: 1 Rep Power: 0	Dear All, could you please inform me about a method (if any exists) to run a LES with SU2? Thank you

November 6, 2023, 13:17		#2
bigfootedrockmidget Senior Member bigfoot Join Date: Dec 2011 Location: Netherlands Posts: 585 Rep Power: 17	Hi, Unfortunately there are currently no tutorials for LES. All configuration options are described in the file config_template.cfg and a quick search shows that these are probably the most important ones: Code: SOLVER= FEM_LES KIND_SGS_MODEL= VREMAN I am not so familiar with setting up an LES, I hope somebody else can add any missing info or hints.

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November 6, 2023, 18:46		#3
A.Roy New Member A Roy Join Date: Sep 2022 Posts: 15 Rep Power: 3	Hi Rob, i don't claim to be an expert in LES (and especially not LES in SU2, I am wading through some DDES and hybrid RANS/LES stuff myself), but I'm linking below a SU2 conference slideshow with some commentary and results on general WMLES and DDES, but importantly for trying to learn how to run the cases, some settings and mesh guidelines also (particularly on slides 6 and 11). While it discusses WMLES (and thus utilizes wall functions), I assume more deliberate mesh refinement and removal of the wall function setting would get closer to WRLES if that is what is required. https://su2foundation.org/wp-content.../06/Molina.pdf Apologies; you may already have this knowledge as you're asking about LES in the first place, but if anyone else browsing this is interested, I'm also linking a DLR paper on 2D RANS vs. Hybrid RANS/LES vs. WRLES for mesh and timestep guidance. https://elib.dlr.de/136427/1/ELIB-Ei...rPublished.pdf