# Correct boundary condition settings for a turbulent wall resolved mesh

Hello community,

i need some knowledge for a turbulent incompressible case.

turbulence modells:

• kEpsilon
• kOmega

Could any body write down the correct boundary condition for a turbulent wall resolved mesh.

patch wall:

• U: noSlip
• k: zeroGradient or fixedValue 0 ?
• omega?
• epsilon?
• nut = calculated?

Hi @e0625598!

Please refer to this post: Defining Turbulent Boundary Conditions

Also the names you states for the â€śwall patchâ€ť you have to make a difference between the patch and the actual wall boundary condition:

• Patch: Generic type containing no geometric or topological information about the mesh (inlet, outlet, etc.)
• Wall: Rigid Wall (patch that coincides with a solid wall \rightarrow using wall functions)

The names are identical on the platform. What case are you trying to simulate? Did you already have a look at the Public Project section to look for a template?

Cheers,

Jousef

Hello @jousefm,
thanks you for your link, but i could not find the required information.

What setting the solver is using when Full resolution on wall boundary condition is selected.

what setting are set on the backend for:

• U
• p
• k
• nut
• omega (if kOmegaSST turbulence model is used)
• epsilon (if kEpsilon turbulence model is used)

Hi @e0625598!

This post might help you out about yplus and wall functions in general: What is y+ (yplus)?

1. â€śFull boundary layer Resolutionâ€ť
• yPlus around 1 (in the viscous sublayer)

• current setup: k = 0

• omega = omegaWallFunction

• nut = nutkWallFunction*

1. â€śWall function approachâ€ť
• 30 < yPlus < 300 (in the logarithmic sublayer)

• Current setup: k = kqRWallFunction

• omega = omegaWallFunction

• epsilon = epsilonWallFunction

• nut = nutkWallFunction

Does that help? For further information I would need to delve a bit deeper into it and see what I can find out.

Cheers,

Jousef

@e0625598 you can find the backend definitions by downloading the solved case file and reading the patch definitions for each variable in time 0.

Best,
Darren

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