The region between these two points is aptly named the boundary layer.

On the other hand, in the middle of the top side is yet another stagnant boundary layer.

The boundary layer is still there, but it's all similarly hot.

A surface can have multiple types of boundary layer simultaneously.

The concept of a boundary layer is important in many aerodynamic problems.

Provided this boundary layer is intact the wall will not be damaged.

There is also a secondary flow in the boundary layer along the floor of the river bed.

This causes the boundary layer over the body of the airplane to grow.

The reason is the higher Richardson number in the outer part of the boundary layer.

There was a noticeable boundary layer between it and the surrounding air.