Why is the flow of water released from the faucet, some of which are very congested, and some of whi

According toFluid mechanicsThe former is calledLaminar flow, the latter is calledTurbulenceThe difference between them is the Reynolds number.

Different. As the faucet is turned on, the water flow velocity increases. Water can change from an initial laminar flow to a turbulent flow.

The Reynolds number is related to the fluid viscosity coefficient and the diameter of the pipe. Generally speaking, the larger the pipe diameter, the easier it is for laminar flow to be converted into turbulent flow, that is, you convert it into turbulent flow. Small-caliber faucets will do, the small mouth of the faucet is more water-efficient.

In fact, the bubbler that can be purchased online is also a water-saving faucet accessory.

It is mainly to mix water and air well to slow down the splashing of water. Of course, the mixing rate of water and air is slow, and the viscosity coefficient also increases, which also stabilizes the water flow. If it is a faucet of poor quality.

It may be a defective internal spinning ball or a protruding pile that causes the water to disperse. Water flows out of the faucet quickly, with almost no bubbles or impurities in a continuous, complete flow. The flow at this point is more like a glass rod, colorless and transparent.

Due to the surface tension at this time.

The function can maintain a complete and smooth interface after the faucet is opened, and the water jetting out from the faucet is a relatively high-speed water flow, the level of the flow rate, and the local water pressure pipe situation is related to the opening of the faucet. At this point, the velocity of the water flowing out of the pipe and out will be very different depending on the location. Due to the viscous resistance of the pipe wall, the flow velocity near the shaft of the water flow center is higher and the flow velocity near the pipe wall is lower.

The flow within the pipe may no longer be a smooth laminar flow, but turbulence may occur, and local radial velocities may occur.

When water flows out of the faucet, due to the change in local radial velocity, it may cause fluctuations in the water and the influence of the force between the water and the faucet, so that the surface of the water flow is no longer smooth, but has many uneven changes. At this time, even if there are no bubbles and impurities inside the water flow, the surface of the water flow becomes the appearance of relief glass, and the light transmittance.

It also gets worse. If the flow velocity is high, the lateral velocity of the water is large enough to break free from the surface tension and escape, and it will appear at the edge or even inside the water flow.

If it is an old-fashioned faucet without a filter at the mouth, the state of the water is purely caused by water pressure, and if the water pressure is large, it will be dispersed, and if the water pressure is small, it will be gathered;

If the faucet outlet has a filter, then in addition to the water pressure is also related to the filter, if you think the water flow is too scattered, try to unscrew the faucet filter to clean it, if it is blocked by fine sand or dirt will cause the water flow to disperse, clean it up will be much better, or simply take the filter out and don't use it.

The center of the earth is attractive to anything. As an object falls under gravity, its speed becomes faster and faster, and this motion is called accelerated motion.

The water near the faucet descends more slowly, and the droplets join together to form a column of water, but the further down it goes, the faster the water flows; Because the speed of each section of the water column is different, the water that runs fast has to leave the water column and become water droplets, and the lower it goes, the greater the distance between the water droplets, and it is dispersed.

In daily life, as long as you turn on the faucet, water will flow out. But do you know how water flows out? Let's do a little experiment, take a small piece of transparent plastic tube, bend it, and then inject some water from one end, and then hold one end of the opening with your fingers, and lift the other end of the opening up, so that the water surface of the upper end will be higher than the holding end.

If you let go of the holding finger, the water will flow from the high end to the low end until both ends are the same height. We turn on the faucet as if we were holding a finger away, so the water comes out.

Extend your knowledge. Do you know the connecting tube? The connecting tube is made up of several containers of different shapes, and the bottom of the container is connected. If you fill any container in the connecting pipe, the water level in the connecting pipe will always be the same height when the water is still.

Water companies use this principle to deliver water to thousands of households. However, homes with higher floors or higher terrain may often face the problem of insufficient water pressure, so it is necessary to use a pump to pump water to the water tower for storage, which is why the water tower must be built on the roof.

Little Doctor's Corner.

Did you know that the deeper the water, the more pressure it gets! Therefore, the deeper you dive, the more careful you must be, and you must not rashly float to the surface, so as not to cause danger due to the inability to adjust the body pressure for a while. The pressure of the water is in all directions.

That is, regardless of the shape of the container, the water pressure is the same at the same depth. The pressure is also related to the density of the liquid. For example, brine is denser than water, so the pressure in brine is greater than in freshwater at the same depth.

Hydrostatic experiments. Fill a clear plastic tube with water.

Plug the opening at one end with your fingers and lift the other end up to see if the water level on both sides changes.

The content of this column is selected from the "New Century Children's Science and Technology Encyclopedia" published by Tomorrow Press. "Little Edison" was granted exclusive selection rights.

According to the noun of fluid mechanics, the former is called laminar flow, the latter is called turbulent flow, the difference between the two is the difference in Reynolds number, with the opening of the faucet, the flow rate of water accelerates, the water can be transformed into turbulent flow from the initial laminar flow, and the Reynolds number is related to the viscosity coefficient of the fluid and the diameter of the pipeline, the larger the general pipe diameter, the easier it is to convert the laminar flow into turbulent flow, that is to say, you can change a small diameter faucet, and the small mouth of the faucet is more water-saving, and the aerator mentioned in the tube paper upstairs is also a water-saving faucet accessory, The main thing is to let the water and air mix fully to slow down the splashing effect of water, of course, the flow rate of water and air mixing is also slow, the viscosity coefficient is also improved, and the water flow can also be stable. The water flow is not up to par with the faucet, and it may be that the internal spinning ball is flawed or a small protruding pile, causing the water to disperse. Quickly flowing out of the faucet, there are almost no bubbles or impurities in the continuous, complete water flow, and the water flow at this time is more like a glass rod, which is colorless and transparent.

At this time, due to the effect of surface tension, a complete and smooth air-water interface can be maintained, and after the faucet is opened, the water jetting out of the faucet is a relatively high speed (the speed is related to the local water pressure pipe situation and the diameter of the faucet). At this moment, the flow of water flowing out in the pipeline and at the outlet will have a large difference due to the flow velocity of different positions, wherein the flow velocity is high near the central axis of the water flow, and the flow velocity is low due to the viscous resistance of the pipe wall near the pipe wall. The flow in the pipeline may no longer be a gentle laminar flow, but may be turbulent, where local radial velocities can occur.

When the water flows out of the faucet, the surface of the water flow at this time is no longer smooth, but there are many uneven changes due to the presence of local radial velocity that may cause the air-water interface to fluctuate, coupled with the influence of the force between the water and the faucet. At this time, even if there are no bubbles and impurities inside the water flow, the surface of the water flow becomes the appearance of patterned glass, and the light transmittance becomes poor. If the velocity is higher, the lateral velocity of the water is large enough to break free from the tension of the surface, and it will occur at the edge or even inside the current.

The more the water flows downward, the faster the speed is, the pressure on the water surface becomes smaller, and the surrounding air pressure compresses it thin, and the principle of aircraft take-off is the same, the top of the airplane wings is arc-shaped, the bottom is flat, the air flow rate above is large, so the pressure above is small, and the pressure below is strong to hold it up. The method of friction is used to electrify the object, which is called frictional electricity, and the object carries static electricity. Charged bodies have the property of attracting small and light objects, and we say that the object is electrically charged, or charged.

Thin. Because according to the relationship between pressure and flow velocity, the higher the flow velocity, the lower the pressure. Therefore, as the velocity of the water increases in the process of falling, the pressure near the flow becomes smaller and smaller, and it is squeezed when it is smaller than the atmospheric pressure.

Water is caused by the interaction of water pressure and faucet outlets. Without changing the water pressure and changing the faucet, we can change the water outlet with the help of foreign objects. So as to achieve the effect we want.

For example, if you turn on the tap water to the maximum, the bottom of it must be bigger than the top! I don't believe in doing the test by myself, because the faucet mouth has certain limits on the flow rate, flow rate, and flow of the water flow. The flow (that is, the distance of the flow) is certain, the greater the flow rate, the binding force of the faucet mouth to the lower end of the water flow is reduced, the lower end of the water injection will be scattered, and the diameter of the water injection is slightly larger than the upper end, because the foaming function increased by the multi-layer filter screen, the direction of the water flow changes, (the water flow belt is slightly spiraling out), so the national standard has certain restrictions on the faucet flow beam (50cm away from the faucet water flow beam can not be greater than 50mm) There is pressure in the water pipe (that is, the pressure).

When the water in the water pipe comes out of the faucet, it is this pressure that makes the water have a speed. Strictly speaking, the velocity direction of the water molecules is not consistent. But water still has viscosity, and the water molecules are still implicated (constrained) with each other, so when they first come out, they are still together, and then they go their separate ways.