Fluids differ in the internal resistance that is exerted, causing differences in viscosity as well. In fluids, the resistance to flow or to deform is known as viscosity. In fluids, the resistance to flow or to deform is known as viscosity Whenever a fluid is not subjected to physical forces other than gravitational force, kinematic viscosity is the right measurement. When external forces are applied to a fluid, dynamic viscosity measurements are the best choice. No two fluids can have the same kinematic viscosity, but they can have the same dynamic viscosity.
