Aerodynamics, from Greek ἀήρ aer (air) + δυναμική itself from δύναμις dynamis (force ; specially, miraculous power), is a branch of dynamics concerned with studying the motion of air, particularly when it interacts with a solid object. Aerodynamics is a subfield of fluid dynamics and gas dynamics, with much theory shared between them. Aerodynamics is often used synonymously with gas dynamics, with the difference being that gas dynamics applies to all gases.

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