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Chapter 46 Lectures on Boundary Layer Equations

On the second day, Zhuoyue, Fang Lao and others walked towards the Parliament Building.

Mr. Fang said: "I will tell the host that you will go on stage to show your scientific research results, and then you will go up."

Zhuoyue smiled and said, "Okay!"

Soon, they entered the Parliament Building and sat down in the lobby on the top floor.

Yang Zhengyu has not come yet.

Big Bull, a top figure, every time it comes, the meeting begins when he comes.

After waiting for about ten minutes, Yang Zhengyu slowly arrived with the help of his wife. The middle-aged woman who had been following him was his wife.

She is also a physicist, but her ability is very different from that of the physicists present, but as Yang Zhengyu's wife, she has the privilege of sitting in the corner and listening.

About two hours after the meeting began, Mr. Fang found the host of the meeting, who was the first middle-aged man to speak on the first day and told him about the excellence on stage and published scientific research results.

About half an hour later, the middle-aged man sat on the podium and said, "Next, please invite the young Chinese physicist Zhuoyue to the stage to publish his scientific research results - the boundary layer equation in fluid mechanics. Welcome!"

"Papapapapa..." After saying that, he took the lead in applauding, and soon there were sparse applause below.

Zhuoyue walked onto the stage with his laptop, shook hands with the middle-aged man who was standing up with his seat, Zhuoyue sat down and connected the computer to the display screen at the back.

"Good morning, ladies and gentlemen!"

"Next, I will explain to you in detail the boundary layer equation I derived."

"I derive three boundary layer equations based on three different situations of boundary layer."

The Excellent hand is placed on the mouse and open the first equation you wrote!

"Please see everyone!"

As he said that, he stood up and walked to the front of the display screen, pointing at the display screen, saying, "This is the equation for the flow of fluid along the regular plane of the plate. After derivation, it is finally concluded that ?u/?x?v/?y=0."

"Through this equation, we can analyze the order of magnitude of the equation."

"Set the speed in the x direction..."

Excellent speech is very clear, the speed of speech is neither fast nor slow, the content is simple to detailed, and the rhythm of the whole audience is under control.

This is thanks to Professor Yang's previous contribution to the weekly class. If he had not had the experience of teaching, he would not have been so calm in this situation at this time.

At this time, he seemed to be teaching. He was a teacher and the people below were students.

Everyone was listening carefully to what he said. At first they had a relaxed expression. Many people didn't believe that excellence could deduce the boundary layer equation so quickly.

Fluid mechanics is spread throughout all corners of the earth and most parts of the universe, and was proposed in the 17th century and has been around for nearly five hundred years.

Although the boundary layer is just a small branch of fluid mechanics, only this small branch still stumps countless physicists.

Therefore, in everyone's opinion, it is simply a fantasy to deduce the boundary layer equation at such a little time.

However, now it seems that excellence really derives the boundary layer equation.

Mr. Fang nodded with relief and loved Zhuoyue very much. There were many other physicists from China, who also expressed relief for Zhuoyue.

Judging from the outstanding contact with this period of time, whether it is talent, character, or appearance, it is impeccable.

Of course, there are also many foreigners who are also amazed at their outstanding talents.

For example, Professor Fermi, Professor Danny, and Professor Sith from MIT, were three professors who discussed fluid mechanics with Excellence at that time in Massachusetts.

There is also Massi, a professor at Caltech University. At that time, he accepted Ji Zhong as a student in the International Theoretical Physics Competition.

and physicists from many other countries.

"From these equations, we can separate the boundary layers and the Carmen vortex streets appear."

"When actual fluid flows through the curved wall, the boundary layer often starts from a certain point to break away from the wall and creates a vortex."

Zhuoyue walked to the computer, moved the mouse, and opened the model of the boundary layer and vortex that had been made long ago.

"Please look, this is a vortex model that appears after the boundary layer is separated..."

After a long time, Zhuoyue suddenly stopped explaining, let out a breath, and bowed and said, "Thank you everyone, my explanation is over."

But his heart did not let go, but instead raised it higher, because the highlight was the next one.

As soon as he finished speaking, a white man said toughly, "After a period of time away from the front of the plate, the flow type in the boundary layer may turn into turbulence, so how is the critical Reynolds number calculated?"

Zhuo Yue smiled faintly and said calmly: "The Reynolds number at the turning point is re=v∞x/v. The Reynolds number is related to factors such as the roughness of the object surface and the turbulence of the incoming flow, which is 5x10?~3x10?."

After hearing this, the white man picked up the paper and pen in front of him and found that it was correct, but he was still dissatisfied and asked: "When δ is very small compared to l, who is the magnitude of y and x, and what is the magnitude of magnitude?"

"When δ is very small compared to l, the order of y is a small amount compared to x, and the order of magnitude is less than 1."

The white man's eyes turned and he thought in his mind. He suddenly thought of a question and said, "Since you mentioned Carmen vortex street, how can you find Carmen momentum equation based on your equation?"

When hearing this question, many physicists in the Huaxia side changed their faces. This problem is very difficult. In the past, many people also tried to do the Carmen momentum equation, but none of them succeeded.

They were secretly annoyed that this white man was really uninterested and actually made things difficult for a child.

Most of the people present were in their forties and fifties, seventies and eighties. In their eyes, excellence was just a child.

Many people in other countries looked at him coldly, and Zhuoyue had nothing to do with them, and they would not help him for no reason.

The three professors at MIT, like the Chinese physicists, are anxious about excellence.

Zhuoyue smiled and said, "This is very simple!"

"Actually, I have derived the Carmen momentum equation, please see!"

Speaking of Excellent Move the Mouse and open a page in PPT.

I saw that there is a complicated formula above.

"You can deduce it to see if I'm correct."

Zhuoyue also depends on the person's treatment. Since the other party doesn't give him a good look, he doesn't even say you, just talk about you.

The white man was shocked, then lowered his head, picked up a pen to calculate on paper, and many people were still calculating.

After a long time, the white man looked at the things he calculated with an ugly expression, right.

The rest of the people who had calculated the calculation looked outstanding in surprise, young and promising!

The person who cares about excellence breathed a sigh of relief, and then a smile appeared on his face. Is excellence still good? He thought about everything attentively.

"I'll ask a question, what is the shear stress relationship of the equation you derived?" asked an old white man.

Zhuoyue said: "l?=μ(?v?/?y)?=0=3μ/2v∞/δ."

A man who looked like India asked: "What are the friction and friction resistance coefficients?"

“c    ?=f?/1/2ρv2bl=1.29re?^(-1/2).”

A white man with yellow hair asked, “What is the total resistance of the object around the flow?”

“f=c1/2ρv2a.”

The problems of foreigners come like storms, but excellence is like a boat in a rainstorm.

Although the wind and waves were violent, his boat was moving forward steadily.

If it weren't for the Chinese physicists who stopped many people, more problems would have arisen.

Anyway, they ask questions from various angles based on excellence. As long as excellence has a little problem, excellence today's scientific research results display will not be considered successful.

After a long time, Yang Zhengyu coughed and the scene quickly became quiet. Yang Zhengyu looked at Zhuoyue and said slowly: "You call Zhuoyue, right?"

"Yes, Mr. Yang!" Zhuo Yue smiled and was excited. The big bull's big bull had a conversation with him.

Although Yang Zhengyu has a lot of bad news in the hearts of many Chinese people, Zhuoyue has a deep admiration for him.

If you don't study physics in depth, you won't know his greatness.

He is a treasure of all mankind.

"The boundary layer equation you derived is very good."

After saying this, he stopped talking.

"Thank you, Mr. Yang."

After that, no one asked the best questions. Yang Zhengyu had spoken, and no one had the strength to deny Yang Zhengyu.

Seeing that no one asked a question, Zhuoyue stood up and said, "My boundary layer equations are finished, thank you everyone."

"Papapapa..." There was a thunderous applause from below, and Zhuoyue walked off the stage with the applause.
Chapter completed!
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