Modes of Momentum Transport and Viscosity

This lecture covers the different modes of momentum transport, including radial transport, rotation, and advective momentum transport. It also delves into the definition of fluid density and dynamic viscosity, explaining the resistance of fluids to flow. The impact of temperature on viscosity in gases and liquids is discussed, highlighting the molecular interchange and cohesive forces in liquids. Additionally, Newton's law of viscosity is explained for laminar flow, emphasizing the transfer of momentum between fluid layers. The lecture concludes with examples of laminar viscous flows and exercises on estimating shear stress and velocity profiles in various scenarios.