Roughness height in wall function

K. Yamamoto

We can set the roughness height for ""No-slip" wall. What is the specific formula for the wall function that reflects the roughness height?

Are there any webpages or documents that compile such information?

acupro

There's a small statement on roughtness_height in the SIMPLE_BOUNDARY_CONDITION and TURBULENCE_WALL commands:

https://help.altair.com/hwcfdsolvers/acusolve/topics/acusolve/simple_boundary_condition_acusolve_com_ref.htm

https://help.altair.com/hwcfdsolvers/acusolve/topics/acusolve/turbulence_wall_acusolve_com_ref.htm

The roughness_height parameter is a dimensional distance/height.

Here's another brief description of the turbulence models, but not with much detail:

https://help.altair.com/hwcfdsolvers/acusolve/topics/acusolve/training_manual/turb_modeling_r.htm