What affects non-Newtonian fluids?

Most commonly, the viscosity (the gradual deformation by shear or tensile stresses) of non-Newtonian fluids is dependent on shear rate or shear rate history. Some non-Newtonian fluids with shear-independent viscosity, however, still exhibit normal stress-differences or other non-Newtonian behavior.

What happens when force is applied to a non-Newtonian fluid?

In non-Newtonian fluids, the viscosity changes when under force/stress to either more liquid or more solid. An example would be ketchup. When you shake a bottle of ketchup, the sauce becomes more liquid. Force applied to the ketchup changes the viscosity/flow.

Which viscometer is used for non-Newtonian fluids?

Capillary viscometers are widely used for measuring the flow char- acteristics of liquids.

Are non-Newtonian fluids viscoelastic?

Common household items like custard, toothpaste, starch suspensions, and shampoo are non-Newtonian fluids. Certain non-Newtonian fluids have an extra property besides viscosity. They become elastic when they are stretched or compressed. The dual characteristic is named viscoelasticity.

What causes a non-Newtonian fluid?

Non-Newtonian behavior of fluids can be caused by several factors, all of them related to structural reorganization of the fluid molecules due to flow. In polymer melts and solutions, it is the alignment of the highly anisotropic chains what results in a decreased viscosity.

What are the Newtonian and non-Newtonian fluids?

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.

What causes a non Newtonian fluid?

What is the difference between Newtonian and non-Newtonian fluids?

The key difference between Newtonian and non Newtonian fluids is that Newtonian fluids have a constant viscosity, whereas non-Newtonian fluids have a variable viscosity. We can divide fluids, i.e. liquids and gases, as either Newtonian or non-Newtonian depending on the viscosity of the fluid.

What is the difference between Newtonian & non-Newtonian fluid?

What is example of non-Newtonian fluids?

The Importance of Newtonian and Non-Newtonian Fluid Dynamics in Processing