The Atmospheric Boundary Layer (ABL) is the lowest part of the atmosphere and its behaviour is directly influenced by turbulence. The study of its characteristics is essential for a broad spectrum of applications: wind turbines, civil engineering, marine engineering, meteorology, etc. The internship project focuses on the reproduction of a "full-depth” ABL in the wind tunnel. Multiscale Inhomogeneous Grids (MIG) and spires are used for this, which are designed in order to simulate any prescribed flows and to avoid trial-and-error approaches. The key objective is to obtain a prescribed mean velocity profile and a turbulence intensity profile representative of the real atmosphere.