Aerodynamics is the study of forces and the resulting motion of objects through the air. The word comes from two Greek words: aerios, concerning the air, and dynamis, which means force.
Aerodynamics is the way air moves around things. The rules of aerodynamics explain how an airplane is able to fly. Anything that moves through air reacts to aerodynamics. A rocket blasting off the launch pad and a kite in the sky react to aerodynamics. Aerodynamics even acts on cars, since air flows around cars.
1.Internal Aerodynamics: It is related to flow of ducts
2. External Aerodynamics: It is related to going away from the bodies.