Reply To: y+ in standard wall function

[Vicky]

 

Hello, excuse me, I wanted to ask if, when doing the two-way coupling with the ROCKY DEM software, I should also consider that the first cell must have a y* greater than 15.
In my research I am analyzing everything related to collisions with the walls of the pipes, so analyzing everything that happens close to the wall is important.
However, I have this doubt since in the ROCKY manual they mention that we should have cells larger than the diameter of the particle. I would appreciate it if you could help me with this question; thank you