Question

What are the properties of viscosity?

Answer 1

Viscosity:

The measure of a fluid's resistance to gradual deformation by shear or tensile stress is known as viscosity.

Types of viscosity:

There are two types of measuring fluid's viscosity:

1. Dynamic Viscosity: Dynamic viscosity is expressed as the ratio of shear stress to shear strain. Its unit is pascal second ($\mathrm{Pa}.\mathrm{s}$) or $\mathrm{kg}{\mathrm{m}}^{-1}{\mathrm{s}}^{-1}$.
2. Kinematic Viscosity: Kinematic viscosity is expressed as the ratio of dynamic fluid viscosity to its density. Its unit is a square meter per second or ${\mathrm{m}}^2{\mathrm{s}}^{-1}$.

Properties of viscosity:

1. Viscosity is determined by the structural properties of the molecules.
2. Raising the temperature reduces the viscosity of the solution or fluid.
3. Viscosity would be a measurement of how components travel across one another.
4. It is determined by the attraction between the molecules.