"Smooth airflow" refers to the consistent and uninterrupted movement of air. It implies that there are no obstructions, disturbances, or turbulence in the flow of air. Full definition
Disc - shaped aluminum wheels also help smooth airflow around the wheel wells. (topspeed.com)
As a result, designers optimized the car's front end for smooth airflow above, below and around the car without compromising styling or engine cooling requirements. (greencarcongress.com)
The sharp cut - off at the trunk edge helps to smooth airflow from the roof when the wing is not deployed — and looks pretty sharp doing it. (topspeed.com)