Assigning surface roughness to a fairing

Let’s say I want something to be pretty rough, about 1mm of variance.
As I understand, I need to create a custom boundary condition, no-slip, Turb. kinetic energy wall function with surface roughness, 0.001m scale. What does turbulence wall setting of ‘wall function’ vs ‘full resolution’ means and what should I use? Any other settings I should touch? (What roughness constant is, for instance?)


I recall reading about the implications of surface roughness in the modeling somewhere but can’t quite remember where it was :neutral_face:. Make sure to check out this video about the topic.

Wall function versus full resolution is related to yplus. If you’re interested in yplus, also make sure to check this thread.


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