Venturi effect

A well-known fluid dynamics phenomenon, made known by the Italian physicist Giovanni Battista Venturi (1746-1822) in 1797, consisting of the decrease in pressure of a liquid or gas flowing through a conduit, when it narrows, as a consequence of the increased speed the fluid acquires. In the atmosphere, the Venturi effect is clearly manifested, both in mountain passes and peaks, and in narrow terrain areas (strait, gorge, valley...), where the flow lines converge, with the consequent local drop in pressure and the increase in wind speed and gustiness.