Introduction: Hydrodynamics

This lecture introduces the fundamental concepts of hydrodynamics, covering topics such as two-phase flows, geophysics phenomena like Kelvin-Helmholtz instability and tornadoes, swimming propulsion analysis, irrigation sprinklers, flow models, flow classifications, instabilities, turbulence, and the importance of intuition in engineering. The instructor emphasizes the transition to turbulence and provides practical examples to develop a critical approach to computational fluid dynamics.