Gas dynamics is a branch of fluid dynamics that focuses on the behavior of gases in motion. It deals with the study of gases under various conditions, such as high velocities, high temperatures, and high pressures. Gas dynamics involves the study of the flow of gases, their interactions with solid surfaces, shock waves, and supersonic and hypersonic aerodynamics. This field of research is essential in understanding the behavior of gases in aerospace engineering, combustion systems, and other industrial applications.