Viscosity is the resistance that a fluid (gas or liquid) has during flow. This resistance or internal friction is caused by the movement of one layer of fluid in relation to another. Therefore, a liquid such as honey, which is highly resistant to movement, has a high viscosity, unlike water that flows easily, thus having a much lower viscosity.
|Square millimeter per second (mm²/s)|
|Square centimeter per second (cm²/s)|
|Square meter per second (m²/s)|
|Square foot per second (ft²/s)|
|Square inch per second (in²/s)|
The International System of Units (SI) uses m²/s to represent kinematic viscosity, however, we can also use centiStokes to represent this measure.