Drag on a Sphere and Newtonian Fluid Mechanics

This lecture covers the analysis of drag on a sphere in Newtonian fluid mechanics, focusing on key parameters such as density, velocity, radius, and viscosity. The instructor explains the dimensional analysis and the process to obtain the drag force using dimensionless groups. The lecture progresses to discuss the significance of Reynolds number in determining the flow regime and the structure of the flow. Various experiments' data are presented to show the relationship between the dimensionless drag force and the Reynolds number. The lecture concludes with the non-dimensionalization of the Navier-Stokes equation to understand the fluid dynamics in a more simplified manner.