- Free Articles
- Peristaltic Pumps Encyclopedia of Microfluidics and Nanofluidics
- Inspecting Glass Bottles and Jars Machine Vision Handbook
- Human and Animal Vision Machine Vision Handbook
- Evolution of In-Car Navigation Systems Handbook of Intelligent Vehicles
- Displays in the Workplace Handbook of Visual Display Technology
- More Free Articles
Newton's Law of Viscosity, Newtonian and Non-Newtonian Fluids
Viscosity is the physical property that characterizes the flow resistance of simple fluids. Newton's law of viscosity defines the relationship between the shear stress and shear rate of a fluid subjected to a mechanical stress. The ratio of shear stress to shear rate is a constant, for a given temperature and pressure, and is defined as the viscosity or coefficient of viscosity. Newtonian fluids obey Newton's law of viscosity. The viscosity is independent of the shear rate.
Non-Newtonian fluids do not follow Newton's law and, thus, their viscosity (ratio of shear stress to shear rate) is not constant and is dependent on the shear rate.