Dear @pl00447 , it is not possible to capture the development of the boundary layer using a y+ = 150 for the first cell. I am not completely sure if that is actually what you want.
When you use wall functions, most (if not all) of the development of the boundary layer occurs inside the cell. Therefore, it is not possible to "capture it. Visualization will show you the interpolation from the cell centre to the faces performed by the post-processor, but not the boundary layer. If you want to capture it, you need to use much smaller y+ values and capture the viscous sublayer. Check this link out: What is y+ (yplus)?
There is some interesting materials here: Wall function usage -- CFD Online Discussion Forums
Specially this link is very useful: http://www.tfd.chalmers.se/~hani/kurser/OS_CFD_2016/FangqingLiu/openfoamFinal.pdf
I hope this helps,
J.A. Gutiérrez