Viscosity is a fluid property that represents the internal resistance of a fluid to motion. The viscosity of a fluid is a measure of its “resistance to deformation.” Viscosity is due to the internal frictional force that develops between different layers of fluids as they are forced to move relative to each other.
Chapters:
0:00 Example from daily life
0:57 Physics behind viscosity
3:56 Newton's Law of viscosity
5:20 When to use dynamic viscosity
6:03 When to use kinematic viscosity
6:47 Effect of temperature
