LES with a wall-function

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xiaoxue123
Posts: 29
Joined: Fri Mar 02, 2018 11:50 am

LES with a wall-function

Post by xiaoxue123 »

Dear forum,

I'm running a LES.

I read from https://www.code-saturne.org/cms/sites/ ... e-Wall.pdf in the last paragraph that "This is the reason why Code_Saturne activates a wall-function by default for LES. If the mesh is fine enough, its influence vanishes and the LES becomes a direct numerical simulation."

Is there any way to check whether or not my LES simulation has activated the wall function by default? My mesh has a y+ lower than one, x+ and z+ low than 40 and 20, respectively.

Best regards,
Xiaoxue
Ruonan
Posts: 136
Joined: Mon Dec 14, 2020 11:38 am

Re: LES with a wall-function

Post by Ruonan »

Hi Xiaoxue,

As far as I know, it can be found in the setup.log file, shown below. I think in Code_Saturne LES, the one scale log-law wall function is used by default. I suppose your meshes are fine enough, so the momentum wall function and thermal wall function are the viscous sublayer ones.
LES wall function.png
Best regards,
Ruonan
xiaoxue123
Posts: 29
Joined: Fri Mar 02, 2018 11:50 am

Re: LES with a wall-function

Post by xiaoxue123 »

Thanks, I found iwallf in my simulation is 0.
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