Why do there whirlpools in the water and why do they have whirlpools in the rivers

Mainly because of the existence of geostrophic deflection force, which is a very simple knowledge of physical geography.

Due to the geostrophic deflection force [1], when the object moves perpendicular to the earth's latitude on the earth's surface, the earth's rotation linear velocity changes with latitude, and due to inertia, the object will have a tendency to maintain the direction of motion of the original velocity relative to the ground, which is called geostrophic deflection force. In the Northern Hemisphere, the object moves from south to north, the linear velocity of the Earth's rotation becomes smaller (the linear velocity is greatest at the equator), and the object remains unchanged due to inertia, so it is biased to the east, which is to the right relative to the direction of motion. When moving from north to south, the linear velocity of the Earth's rotation increases, so it is biased to the west, and the relative direction of motion is also to the right.

Therefore, when the object in the northern hemisphere moves, it is uniformly subjected to the rightward geostrophic deflection force. In the same way, objects are uniformly subjected to a leftward geostrophic deflection force when moving in the southern hemisphere. Now let's look at the whirlpools created by this current.

If there is no geostrophic deflection force, the water will flow in a radial line from the center. The direction of the inflow velocity points to the center. For example, on the equatorial line of Ecuador, the famous country of the equator, when the water was filled with a funnel, the water flow dropped vertically without forming a vortex.

In the Northern Hemisphere, the inflow velocity is to the right, so the inflow velocity is directed to the center to the right, creating a counterclockwise vortex. Similarly, a clockwise vortex is formed in the Southern Hemisphere.

Since the linear velocity of the earth's rotation changes with latitude, due to inertia, the object will have a tendency to maintain the direction of motion of the original speed relative to the ground, which is called the geostrophic deflection force.

Don't know. But when I was in middle school, I saw a child drowned in a whirlpool, and the whole body of the child was very swollen, just like a balloon, and his bones were broken in some places, but the wounds were all in the body on the surface, and his waist was twisted, which was enough to see how powerful the whirlpool was! The bones of the poor child's arms were also broken by the whirlpool...

The stomach was broken, and the large intestine and small intestine were broken and twisted into filaments, just like strips of cloth. The liver, stomach, intestines and feces are mixed together, and the scene is extremely smelly. The child's mother was going crazy, and when she shook the child's body, the dead child made a "whirring" sound, and sticky blood (mixed mud) flowed from the nostrils, ears and mouth of her colleagues.

The child is okay with water, it was swept into the whirlpool in the sand mining pit, and when it was salvaged, it was not found along the river at first, and then it was found in the mud at the bottom of the place where the whirlpool had been drained (that is to say, the whirlpool brought the child's body to the bottom of the sand mining pit), and it is not clear whether the whirlpool was formed by the whirlpool or the quicksand collapsed at the bottom of the river. . .

I live in the north, and there are a lot of sand pits in the upper river of the inner town where I went to school! It's ten meters deep! Therefore, there is a reason why the state restricts mechanical sand dredging, and the sand is not sand but small pebbles in the river.

A vortex is a spiral confluence formed by two or more strands of energy (such as air flow, water flow, electric current, magnetic current, debris flow, etc.) that are different in direction, flow velocity, temperature, etc., when they come into contact with each other. The confluence forms an inlet and an exit in and out in the direction of the axis of the vortex plane.

A spiral-shaped whirlpool formed by the flow of water in a low-lying place is a whirlpool. This is because the water flows in as soon as it hits a low place, but when there is more water flowing in, some of the water gushes out of the low area, so that the two currents will create a whirlpool.

We will find that on the surface of the river with a rapid current, it is often the case that the flowing water suddenly turns around at a certain place, which is the so-called "whirlpool". In rivers, whirlpools are not everywhere.

Some whirlpools appear next to the bridge's piles and reefs emerging from the water. The main reason is that in the very rapid flow of water, a part of the water is blocked by bridge piles or reefs, and can no longer move forward, so it is forced to retreat, but the water that comes up behind it still flows forward vigorously as before, and carries the part of the water that is forced to retreat with it, but when they flow to the front, they are blocked back by bridge piles or reefs, and then retreat like this, and the water that comes and goes can only turn in the same place where the way is blocked, so there is a whirlpool.

In addition, whirlpools can also occur in places where rivers and waterways make sharp turns. There, because the water flows in a straight line, the channel near the inner side of the bend also flows straight forward away from the guidance of the bank, but the bank on the outer side of the bend forces the outer side of the water to flow in the direction of the outside, so the inner water is forced to retreat under the pressure of the outer current, and a whirlpool is formed. If we go swimming in a river, we must not swim into the whirlpool, because the sharp rotation of the whirlpool will spin people to the bottom, which is quite dangerous.

1.The principle of the vortex in the water opening.

A whirlpool in water refers to a swirling vortex formed in a water current. Whirlpools usually appear at the edge of the current and rotate with the direction of the current. Vortices are formed due to different velocities, in which the faster currents are forced to "squeeze" out as they approach the slower currents, creating a circular swirling flow.

The size and shape of the vortex depends on the velocity and flow pattern of the fluid.

2.Classification of whirlpools in water.

Swirls in water can be divided into two types: rotational right and rotational left, and their formation and rotation direction are related to the current velocity and flow pattern. In addition, the vortex can also be distinguished into pressure vortex and inertial vortex, the pressure vortex is mainly due to the action of disturbance, and the inertial vortex is formed due to the action of inertial force.

3.The effects of swirls in water on the environment and organisms.

Water whirlpools have some degree of impact on both organisms and the environment. They can change the speed and direction of water flow, affecting the water temperature, nutrients, and oxygen content of surrounding water bodies. At the same time, whirlpools can also change the flow pattern of water bodies, leading to siltation and pollution of water bodies.

For aquatic organisms, whirlpools not only affect their habitat and living environment, but also directly affect their growth and reproduction.

4.Measures to deal with whirlpools in the water.

Under certain conditions, whirlpools can cause great distress to people. For example, in water bodies such as swimming pools, reservoirs, and boats, whirlpools can affect not only the safety of swimming and navigation, but also people's psychology and emotions. To do this, the following measures can be taken to deal with the problem of whirlpools in the water:

Increase the stability of water flow, adjust water flow and water flow distribution, change water flow direction and water morphology, and strengthen water management and maintenance.

5.Conclusion.

Swirls in water are a very common natural phenomenon, and they have a certain impact on the environment and the air. However, under certain conditions, whirlpools can also cause inconvenience and distress to people. Therefore, in the case of whirlpools, we need to take effective measures to ensure the operation of water bodies and the balance of ecology.