Advice 1: How to make a Newtonian liquid

A Newtonian fluid is any fluid, which is in accordance with the law of viscous friction Newton. According to this law, the liquid will continue to have flowing properties, regardless of what forces act on it. To do a Newtonian fluid is incredibly simple.
How to make a Newtonian liquid
Examples of ready-made (!) Newtonian liquids in everyday life a huge amount. This water, vegetable oil, and milk. Many other examples you can think of, if even to walk down the street or the apartment. What would be the force acted on water, oil or milk, they still will retain its liquid state, whether it be mixing, transfusion and other physical effects.
Another thing is a non-Newtonian fluid. Their peculiarity lies in the fact that their fluid properties vary depending on the speed of its current. Non-Newtonian fluid is easy to obtain, mix water with food potato/corn starch.

Advice 2 : What is a non-Newtonian fluid

Normal fluid flow, shimmer, different light permeability. But there are substances that are able to stand upright and even to withstand the weight of a person. They are called non-Newtonian fluids.

What is a non-Newtonian fluid
There are emulsions, the viscosity of which is changeable and dependent on strain rate. Suspensions with properties contrary to the laws of hydraulics, developed a lot. Their use is widespread in the chemical, refining, oil and other sectors of modern industry.

Among non-Newtonian fluids can include wastewater, mud, toothpaste, liquid soap, mud, etc. Usually these mixtures are heterogeneous. They contain large molecules that can form complex spatial structure. Exceptions are suspensions prepared on the basis of potato or corn starch.

Preparation of non-Newtonian fluid at home

To create the emulsion will require water and starch. Usually the ingredients are used in equal parts, but sometimes the ratio is 1:3 in favor of water. After mixing, obtained liquid resembling the consistency of jelly and with interesting characteristics.

If a container of emulsion is slow to put the item, the result will be similar to dipping things in paint. Well swinging and hitting the mixture with your fist, you can mark the changes of its properties. The arm will rebound as from a collision with a solid substance.

Poured from a great height the emulsion in contact with the surface, accumulates lumps. At the beginning of the jet it will flow like an ordinary liquid. Another experiment is to slowly put your hand in the composition and sharply compress fingers. Is formed between the solid layer.

You can put the brush to the wrist in the suspension and try to pull her sharply. There is a huge probability that the capacity of the emulsion will rise together with your fingertips.

The use of a non-Newtonian fluid characteristics in the creation of slime

The first such toy was created in 1976, It has gained immense popularity due to its unusual properties. The slime was flexible, fluid and have the ability constantly to transform. This quality has made the demand for the toy is huge among children and adults.

Quicksand - non-Newtonian liquid desert

They have overnight properties of solid and liquid bodies due to the unusual configuration of the grains. Under quicksand water flow whips loose layer of grit to the moment, until the mass passes to the bottom of the traveler neither brings down the structure.

Sand is redistributed and begins to suck man. Attempts to get out independently, lead to the rarefaction of the air, with Titanic force pulling legs back. The effort necessary for release of the limbs in this case comparable to the weight of the machine.

The density of the quicksand more the density of the groundwater. But to swim in them. Due to the high humidity of the grains to form a viscous substance.

Any attempt to move causes a powerful reaction. The sand mass, moving with low speed, no time to fill a cavity that is formed around the subject. It creates a vacuum. In response to a sudden movement of the suspension hardens. The movement in the shifting Sands is possible only in the case when it is carried out very smoothly and slowly.

Advice 3 : What is a Newtonian fluid and its antipode

A Newtonian fluid is any fluid substance having a constant viscosity regardless of the external voltage, which is affecting him. One example is water. From non-Newtonian fluids the viscosity will vary and depends on speed.

What is a Newtonian fluid?

Examples of Newtonian liquids are suspensions, suspensions, gels and colloids. The main feature of such substances is that the viscosity is constant and does not change relative to the rate of deformation.

Strain rate is the relative voltage, which appears in the liquid during its movement. The majority of liquids — Newtonian and apply Bernoulli's equation for laminar and turbulent flows.

Strain rate

Shear-sensitive liquids more fluid. The shear rate or the gap between the substance and the vessel walls, as a rule, not affect this parameter and can be neglected. The value of strain rate is known for all materials and is valued.

In some cases it is, however, subject to change. For example, if the liquid is an emulsion, which is applied to the film for photography, even minor defects can lead to stains, and the final product will not possess the necessary qualities.

Liquids and their viscosity

In Newtonian fluids, viscosity is independent of shear rate. However, for some of them, the viscosity varies with time. This is manifested in the pressure change in the tank or pipe. Such fluids are called dilatant or thixotropic.

For latent fluids the shear stress increases as their viscosity and increasing shear rate are interrelated. For thixotropic fluids these parameters can change randomly. The strain rate can not increase quickly with decreasing viscosity. Therefore, the speed of motion of particles may increase, decrease or stay the same. It all depends on the type of fluid. However, the strain rate tends to decrease. This means that the pump power will also decrease with the velocity of the substance. In other words, fluid is first viscous, but once it starts moving, it becomes less viscous. This means that less energy is needed for its transfer.

Disregard for the power of the engine of the pump is common. This value is usually calculated for viscosity of fluid in motion. In practice, a much more powerful motor to force the substance to move. Ketchup is one example of this phenomenon. That is why we have to shake the bottle so it started leaking. Once the process has begun, it proceeds much faster.
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