Wind trail extension 01

Extensions of calm zones with volumes of various shapes and orientation
The cubic solid, or in any case square-shaped, produces a trail of depth equal to about twice the side of the cube, and equal to twice and three quarters, if the wind blows along the diagonal.
The image represents the extension of the trail in the leeward area of a cubic-shaped building with wind direction perpendicular to the facades and along the diagonal.
Extension of the trail of a U-shaped building and a parallelepiped to the orientation of the wind.
Extension of the wake when the buildings have a parallelepiped shape and the wind direction perpendicular to the longer facades.