Non Newtonian Fluids
A fluid whose viscosity is not constant based on applied stress is known as non-Newtonian fluid. Cornstarch dissolved in water is one such example. These fluids can be used to explain and understand physics. They are marvellous substances. On the other hand a Newtonian fluid like water acts normally.
Stress and strain
Stress is when a force is applied to a substance and the result is strain. In case you apply a hammer on a metal object. On the particular area you will see the result of that stress which is known as strain. In case you apply stress on Newtonian fluids, they won’t resist stress and this is why they do not show any signs of strain. In case you hit water with a hammer, water won’t resist any stress and will show no sign of strain.
For non-Newtonian fluids, if you apply a force or stress, it will get thicker. It acts like solid or even gets runnier as compared to their original state. Remember that when you remove the stress, they will return to their state they were in before.
Types of non-Newtonian fluids
There are different types of non-Newtonian fluids. Some fluids will turn into solid state more in comparison with other non-Newtonian fluids. On the other hands some of these fluids react on the amount of stress while others react on the length of stress applied.
You can use it as body armour. This armour will be in its liquid state so it can move easily. However, when stress is applied, it will turn into solid form. It will be suitable for police and army officials.