What is pseudoplastic rheology?

What is pseudoplastic rheology?

In rheology, shear thinning is the non-Newtonian behavior of fluids whose viscosity decreases under shear strain. It is sometimes considered synonymous for pseudoplastic behaviour, and is usually defined as excluding time-dependent effects, such as thixotropy.

What are examples of pseudoplastic fluids?

In contrast to a Bingham fluid, a pseudoplastic fluid is a fluid that increases viscosity as force is applied. A typical example is a suspension of cornstarch in water with a concentration of one to one. This cornstarch behaves like water when no force is applied; however, it is solidified as force is applied.

Is alginate a pseudoplastic?

that the suspension with sodium alginate was pseudoplastic fluid.

What are the types of rheometer?

There are two distinctively different types of rheometers. Rheometers that control the applied shear stress or shear strain are called rotational or shear rheometers, whereas rheometers that apply extensional stress or extensional strain are extensional rheometers.

What is meant by pseudoplastic?

1 : lacking the capacity for major modification or evolutionary differentiation — compare euryplastic, stenoplastic. 2 : characterized by or being flow in which the rate of flow (as of solutions of rubber or gelatinous substances) increases faster than normally in relation to the shearing stress.

What is the difference between thixotropic and pseudoplastic?

The key difference between thixotropic and pseudoplastic is that the viscosity of thixotropic fluids decreases upon applying a force whereas the viscosity of pseudoplastic fluids increases upon applying a force. Fluids are liquid or gaseous substances that have a viscosity.

What are pseudoplastic materials?

Pseudoplastic fluids are shear thinning fluids, the opposite. The viscosity of these fluids decreases as the shear rate increases. These types of fluids are much more common than dilatant fluids and naturally occurring examples include quicksand, blood, and milk.

Are hydrogels Newtonian?

They characterized the viscosity of gelatins with a power-law fluid model and found that hydrogels have a non-Newtonian behavior with a power- law index of 2.25. Thus, hydrogels have significant shear- thickening behavior, where their viscosity increases with shear strain rate.

What is the difference between rheometer and viscometer?

What’s the difference? Typically a viscometer employs a mechanical bearing that limits the speed and torque capabilities of the instrument, whereas a rheometer uses a low friction air bearing.

What is the instrument used to measure viscosity?

viscometer, instrument for measuring the viscosity (resistance to internal flow) of a fluid. In one version, the time taken for a given volume of fluid to flow through an opening is recorded.

What is the difference between plastic and pseudoplastic?

The key difference between plastic and pseudoplastic flow is that plastic flow describes the flowing behavior of a material after the application of stress, whereas pseudoplastic flow exhibits the behavior of both Newtonian flow and plastic flow.