Questions concerning Meshing.
 

I have some Questions concerning Meshing.

As I know, the Subdivisions of the Near-Wall Region can be divided into 4 as follows, namely: viscous sublayer, buffer layer or blending region, fully turbulent region or loglaw region, outer layer.

Suppose I am using LES and NearWall Model Approach, I have to set the 1st grid point near the wall around y+=5. but what's then?

what's the stretching ratio of mesh normal to the wall and parallel with the wall (including along the flow and perpendicular to the flow)?

is there a constraint of the stretching ratio to keep it not larger than a certain number or what?

how many grid points do I need to mesh in buffer layer or blending region? and how many in fully turbulent region or loglaw region? outer layer?

Any help would be greatly appreciated.

Daniel

Re: Questions concerning Meshing.
 

Could anyone help me on this topic? Thanks