Want to lie flat?Duck duck tells you how to scientifically draw water

Author:Institute of Physics of the Ch Time:2022.09.25

At 6 am Beijing time on September 16th, the 32nd first funny Nobel Prize was announced! Yes, you read it right, it is indeed "the 32nd first". The award has been awarded once a year since 1991, but it is always the first session. Just as many friends think that they will always be 18 years old, they will always be young and always full of mystery! Today we want to lead you to review the research of this physics award.

As the saying goes, people are like their names. Frankfish, a professor of biology from the University of Westiuster, said that he likes fish very much. In fact, as a biologist, he not only loves fish, but also loves to study ducks swimming in the water. What is the magic of duck and ducks that allow researchers to add to it?

When the little friends were playing outdoors, did they notice such a phenomenon: The young duck always followed the duck mother to swim forward, like an organized and disciplined formation in a "one" shape.

So the question is, why do young ducks formation swimming forward? Is this for saving effort or another picture? How much energy can be saved if it is to save effort? In order to reduce energy as much as possible, what kind of formation is most conducive to the collective progress of duck clusters?

In order to answer these doubts, in 1994, "Professor Fish" published an article on duck and duck swimming. "Professor Fish" studied the energy consumption of the ducks when swimming. From the perspective of metabolism, the energy consumption assumptions in the queue movement, that is, the increase in the number of young ducks in the queue, the energy consumption of each young duck will be reduced, the energy consumption of each young duck will be reduced. Essence However, the research on duck and duck swimming has not ended. In 2021, Dr. Yuan Zhiming's research team published a new duck and duck swimming paper, which explained the problem of the formation duck group during the water parade. After 7 years of field observations, they established a precise numerical calculation model, and finally discovered the wave secrets of duck and ducks during swimming, and these waves contained the reason why ducks and ducks saved their efforts.

Dr. Yuan Zhiming introduced the duck and duck queue in the funny Nobel Prize

According to life experience, we know that when the ship passes by the lake, a V -shaped wave will be aroused later. The earliest mathematics research on ship waves was Kelvin, so it was called the Kelvin ship. Just as the ship is marching on the lake, when the ducks are traveling in front of the water, the Kaerwin shipwalk is also generated behind them. This wave will spread to the back of the object from a certain angle.

For driving ships, the ship was put on pressure on the water and split the water to move forward, so it stirred a group of waves that moved forward with the boat. This is the first wave. When the stern was advancing, a low -pressure area was left in the water, which became a valley, forming a group of waves caused by the stern, called the tail wave. Due to the navigation of the ship, the first wave and tail wave emerged, and the energy was required, and the resistance of the wave was formed.

Studies have found that in the "one -formation form" composed of ducks and ducks, the young ducks can be used by the waves produced by "riding" the duck to reduce its own wave of resistance, that is, the resistance of the waves actually becomes Pushing the young duck forward. What is even more amazing is that this situation can be maintained in the "one -tied form" composed of ducks and ducks. The first and second ducks behind the head duck were pushed, which achieved the effect of saving effort. At the end of the third duck to the queue, the individual's power will gradually approach zero, thereby achieving a dynamic balance. In this state of balance, each young duck is the role of a wavy conveyor, so this phenomenon is vividly called the waves. This process is like a relay match, which eventually achieves the effect of "rain dew".

Nature is so amazing, allowing ducks and ducks to reduce resistance in the process of moving forward. The discovery of this study also inspired people to apply this principle to the improvement of maritime transportation efficiency. The bionic design of Chuanbo has been applied to the "Maritime Train" project in the United States. Maritime trains are composed of four or more unmanned driving water vehicles, which are rowed into a row of driving to minimize the overall resilience of the train.