What is Aerodynamics?

The word Aerodynamics is made up of two words. 'Aero' and 'Dynamics'. Aero means Air and Dynamics means motion. Aerodynamics is simply study of air in motion. 

Oxford dictionary gives definition of Aerodynamics as 'The study of the properties of moving air and the interaction between the air and solid bodies moving through it'.

1. As we know from definition of aerodynamics, we study about air in motion in aerodynamics. So motion of air could be of any form. It could be either motion of air over the body or motion of air through pipe or duct.

2. In aerodynamics we study about production heat due to motion of air. When air moves it has kinetic energy in it. And when air collides on any other body or other air molecule, velocity of air reduces so kinetic energy is also reduced. But we know from first law of thermodynamics, Energy can neither be created nor be destroyed but it can transferred from one form to other. So reduced kinetic energy of air is converted into heat energy. And temperature of air increases. In Aerodynamics we study such type of phenomena also.

Studying airflow over Airfoil and design most efficient airfoil for aircraft

Designing aerodynamic shape of automobiles to improve their efficiency

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Get more information about Aerodynamics from here

https://www.grc.nasa.gov/www/k-12/airplane/bga.html

https://www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/what-is-aerodynamics-k4.html