Named after the famous physicist and mathematician, Sir Isaac Newton, nonNewtonian fluids do not follow his observations made in his work classified as the
Newtonian mechanics.
To understand the concept of non-Newtonian fluids it is very important to have a
clear understanding of the Newtonian fluids in the first place. According to
Newton's theory, under normal temperature and pressure, fluids possess constant
flow or viscosity and take the shape of the container in which they are poured. The
fluids that satisfy both these conditions are known as 'Newtonian fluids'. On the
contrary, further study in the field of fluid mechanics revealed that there are certain
non-homogenous fluids that exhibit a change in their state or a change in viscosity
upon the application of shear stress. These fluids are categorized as non-Newtonian
fluids.
The Mystery of Quicksand is an example of non-Newtonian fluid, whose viscosity
increases with the decrease in rate of stress being applied and vice-versa. This is why
it obstructs the rapid panicky movements of any object or body inside it. The trick
to get out of quicksand is to move slowly towards a safe edge.
Science is amazing and magical. The more we try to understand it, the more
complicated it gets. All its complexities are a virtual gift to mankind, prompting
man to push his limits to explore further into the darkness. One of such amazing
occurrences is the non-Newtonian fluids!
- 22 -