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6 properties of non-Newtonian fluid
Physics | 6 properties of non-Newtonian fluid
Non-Newtonian fluid viscosity depends on the velocity gradient. The viscosity of non-Newtonian fluids of individual change over time. Put simply: this matter is not entirely clear what state it resides – solid or liquid. Let us explore this mysterious substance.
If a cold and snowy winter day, sprinkle with salt icy roads, the snow and ice will melt faster. If you cook a hard boiled egg, then return it to its original contents liquid state is no longer possible. These processes are called chemical changes. These are changes that occur, for example, preparing food, burning wood and rusting metal.
But sometimes the substance is able to re-enact their original condition. A good example is the candle wax. When the candle burns, the wax becomes liquid. This fluid will freeze again.
Now we will prepare a non-Newtonian fluid and observe the behavior of themselves unusual substance, which is either liquid, or solid. This substance is called in English Oobleck (Uublek).
Components and equipment
1 cup cornstarch, 1 bowl, water, plastic container, food coloring, unnecessary newspaper, which can be covered table.
Should warn that during the experiment easily soiled and dirty all around. Should wear old clothes and something to cover the furniture and surrounding objects.
Pour a glass of cornstarch in a bowl. Slowly mix with a little water to the consistency of the mass began to resemble syrup. Add a few crystals of food coloring, but you can do without it.
Squeeze in a fist this sticky mass. What will happen? Can you form a ball of it? Put the ball on an open palm. See what happens. What happens if you put a lot of other container?
Just the Facts
1. Non-Newtonian fluid at the same time is in solid and liquid state.
2. If you build up a ball of it, it will lose shape when tossing in the air.
3. When placing the container it is (unlike the conventional liquid) does not acquire its form.
4. If you put it in the sun, it fade, its upper side hardens, and the bottom will remain soft.
5. It does not bounce off surfaces like elastic ball.
6. And, of course, Oobleck inedible!
The reason for this behavior ambiguous nentonovskih fluids is that they are generally comprised of large molecules that form complex structures. Additionally, the compounds of this category are highly heterogeneous in composition.
For explanation Education.com
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