On the Wake Effect and Dirty-Air Generation in Formula 1 and High-Performance Motorsport

Abstract

This review focuses on the wake effect and the generation mechanism of “dirty air” in Formula 1 and other branches of motorsport. First, the fundamental concept of the wake effect is introduced: when a car travels at high speed, the surrounding airflow is altered by the vehicle’s geometry and velocity, producing an aerodynamic phenomenon whose wake profoundly modifies the aerodynamic performance of any following car, changing key parameters such as lift and drag. Next, the nature of “dirty air” is examined in depth; this term refers to the turbulent, unsteady portion of the wake whose origin lies in components such as the rear wing and diffuser. As these devices operate, they shed strong vortices and trigger flow separation, thereby creating “dirty air.” Investigating dirty air is essential for understanding drafting tactics and optimal overtaking opportunities. A thorough study of both the wake effect and the mechanism by which dirty air is generated can guide future car design, enhancing performance and increasing the spectacle of the sport.