What field of study does fluid dynamics encompass?

Fluid dynamics is the branch of physics that deals specifically with the behavior of fluids (liquids and gases) in motion, alongside the forces acting upon them. This field examines how fluids flow, the interactions between fluids and solid boundaries, and the various forces that influence fluid movement, such as pressure, gravity, and viscosity.

Understanding fluid dynamics is crucial for a wide range of applications, including engineering, meteorology, oceanography, and aerodynamics. It helps in predicting how fluids behave in different scenarios, such as airflow over an aircraft wing or water flow in pipes.

The other areas mentioned do not pertain to fluid dynamics. For example, the behavior of solids under stress pertains to materials science and structural engineering, while static equilibrium of revolute joints is related to static mechanics. Thermodynamics of gaseous mixtures involves the study of thermal properties and energy transfer, which is more focused on temperature and heat rather than the motion of fluids.