Roughness of ground plane internal flow area

[igaviano]

Hi @jjansman, thanks for your post on the forum

I see an old forum post you made where my colleague Ricardo answered your question on that, his answer seems to be correct:

ABL and roughness height in custom boundary

No worries. Just keep in mind that the “Roughness height” under the custom BC definition is sand-grain roughness, meanwhile the ABL profile uses aerodynamic roughness instead. There is a 32.62x conversion factor between them. i.e Ks = 32.62 x Z_0 Cheers

Did you find anything wrong in it? Please let me know!

Best,
Igor