Ducks and ducks are dependent on their feet?No, there are waves (not adjectives) 丨 Funny Nobel Prize

The 32nd first funny Nobel Prize, today's grand lottery! The fruit shell brought the award review and interpretation for the first time.

This article you are reading is an introduction to the study of this physics award.

If you want to see the summary of all the awards this year, please poke here: 2022 Funny Nobel Awards.

The old saying is good: people are named. For example, Jaylen made people sink for Jay, and Yi Feng was easily blocked.

And people with fish in the name will also prefer the fish. For example, a professor named Frank Fish, he said that he also liked FISH.

However, the "Professor Fish" Frank Fish not only loves fish, but also ducks in the water. As a professor of biology, the main direction of his research is the motility of animals. In 1994, Professor Frank published an article on duck and ducks swimming, studying the energy consumption of ducks and ducks when swimming.

However, the research on duck and duck swimming has not ended. In 2021, Dr. Zhiming Yuan's research team published a new duck and duck swimming paper. These two studies have won this year's funny Nobel Prize in Physics.

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

What is the charming magic of duck and duck swimming to make researchers "sink"?

One duck and one duck travel 丨 Satya Prakash Karan/YouTube

Ducks and ducks that break the waves

In the draft show, the stage performance of each team is very particular about the position, and the "water performance stage" of ducks and ducks is no exception. The "one" shape is simply the standard team of the duck duck group.

Follow 丨 Vicki Jauron/Babylon and Beyond Photography

The reason why ducks like to "move forward" are still under research, but the benefits of this formation have gradually presented: effort. It can be said that "it is not because of effort to queue, but because of the queue and save effort."

In the experimental device, the researchers calculate the metabolic rate by measuring oxygen consumption.

Frank "trained" a few days of wild ducks in the study, allowing them to swim with female ducks in the experimental device. Subsequently, they experimented with ducks that grew up to 3, 7 days, and 14 days, respectively. The metabolic measurement of ducks and ducks shows that with the increase in the number of ducklings in the line, the energy consumption of each duckling is reduced. This experiment proves from the perspective of metabolism that the energy consumption assumptions in the queue movement.

The reason behind saving effort is because of "waves".

Dr. Yuan Zhiming and others had observed ducks and ducks for 7 years, and established related mathematical models to discover the wave secrets of duck and ducks during swimming.

The stress map of ducks on the static water surface and the same wavelength but different plants. (The green curve represents the water surface, the blue curve indicates the pressure on the duckling body surface, the direction of the arrow representation) 丨 References [3]

In the "One Team", when the little duckling is the most appropriate position behind the mother duck, the wave resistance at this time will become "positive" -the direction of resistance becomes the same as the duckling. At this time The phase of the waves is shown in Figure D above. In other words, the resistance at this time actually turned into a thrust from the back, "pushing" the duckling to break the waves. What's more delicate is that this situation can be maintained through the ducklings in the formation. The first duckling and the second duckling behind the big duck were pushed, which could save effort. From the beginning of the third duckling to the end, the individual's power will gradually approach zero, thereby achieving a dynamic balance.

Line forward 丨 Martin Diebel/Discovery

There are so quiet years, but there are ducks moving forward for you. This mechanism of Wave-Riding and Wave-Passing allows the ducklings that follow the ducks swimming unimpeded.

duck saving effort, saving oil saving oil saving

There are not only ducks, but also boats swimming in the water. Since ducks are so smart, of course, humans need to inject some wisdom into the ship.

The research team of Wuhan University of Science and Technology analyzed different ship formation structures, and found that the total resistance coefficients of the team team teams in the series of fleets were effectively reduced, which means that it is more energy -saving.

Thinking more, is it possible that the entire maritime train in the future ... Dr. Yuan Zhiming's team is really studying related concepts, hoping to improve the efficiency of maritime transportation.

Who does not expect maritime trains in "King of Navigation" to enter reality.

Smoke Tom Maritime Train 丨 Navigation King wiki

references

[1] Fish, Fish, Fish -Improbable Research. Https://improbable.com/airchives/paperair/volume12/v12i3/fish-v12i3.pdf

[2] Fish, Frank Energy Conservation by Formation Swimming: Metabolic Evidence from Ducklings.

[3] Yuan, zhi-ming, et al. "Wave-Riding and Wave-Passing by Ducklings in Formation Swimming." Journal of Fluid Mechanics 928 (2021).

[4] Why do the ducks cross the river? Intellectuals.http://zhishifenzi.blog.caixin.com/archives/250888

Edit: Window knocking rain

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