Metropolis: My IQ is 300

Chapter 136

Chapter 131 Have you studied the 5g halfway card? (Seeking subscription, fifth more)

"Chen, I think you are making me happy. Moonlight armor and weapon installation, isn't it easy?"

"Don't use those so-called bullets to measure my thinking. What I am thinking is how to blow the air out, and then, can maintain a certain degree of stability."

"This seems to exist. The airflow generated by the aircraft's engine is actually very strong."

"I know, but how much power does that airflow achieve? Do I use that much power just to make a blow that is useless?"

"How do you do it, even if I don’t understand this, I also understand that you want to control the air, right, that’s okay, but you have to have a means. If you fire it with a weapon, it’s fired, but the result is obvious. , After going out, can you still control it?"

"Nonsense, isn't this stuck here? Originally I planned to think about 5g, but this thing was given to the owner. I thought the ns equation would be very simple, but I found it was a deep pit."

"Okay, don't think about it, what do you have to eat today?"

Eat shit you.

Just know to eat.

How can such a person make money? Chen Fan was even suspicious.

By noon, the crowd gradually increased, and a lot of people came to visit.

The big guys got together and chatted.

And Chen Fan was talking about the ns equation with Hua Xiong.

"Where is the ns equation calculated now?"

"Is this? I knew you were going to study for a long time, and I prepared the information for you in advance, and I will give it to you."

After taking out the file, Chen Fan compared it.

"After all, the macroscopic fluid motion in nature occupies the majority. The NS equation defines its applicable condition as macroscopic motion. The slightly more technically difficult term is that the fluid satisfies the continuum assumption. The continuum assumption means that we are in the flow field. Take out the fluid cluster at will. 03 This fluid cluster is infinitely small in the macroscopic view. Therefore, the physical quantity of the entire flow field can be subjected to mathematical limit differential and integral operations. At the same time, the fluid cluster is infinite in the microscopic view. The cluster contains a large number of molecules, so that a statistical average at the molecular level can be carried out to obtain the flow field variables that we usually see.

The assumption of continuum medium needs to be satisfied: the minimum spatial scale of the fluid problem studied is much larger than the average free path of molecular motion (under standard conditions, the average molecular free path of air is on the order of one-tenth of a micron. For specific values, please refer to the molecular motion theory. ), this is true in most macroscopic situations, and it is also the basis for the NS equation to be widely adopted, even in turbulent flow, so it is guaranteed that the NS equation is also suitable for describing turbulence.

"What do you mean, the graphene I studied before seems to be related to the ns equation?"

"Yes, you should understand electricity. In fact, this is also an extension of the ns equation. The ns equation theory is not an equation. The macro definition is an equation. If it involves onlookers, it is actually a natural phenomenon. How do you explain, probably what you understand is the game theory defined by onlookers?"

Chen Fan understands this. It probably means this. In fact, when the current flows, it is a very interesting subject.

Eighty percent of people have thought about it, but there is no way to explain it.

It was the earliest time that people who discovered game theory had thought about it, and others had thought about it, but because it was too unthinkable, it became very subtle.

"Okay, don't think about it. This is not something that can be done in a day or two. The experimental data is part of it. For example, normally, particles are moving and everything is moving. There is no such thing as immobility. Speaking of a stone, it is also in motion, but it is very small, and the particles in it are also moving steadily, but so small that we can’t use experimental data to observe it.”

In fact, the accuracy is not enough, Chen Fan knows it.

"By the way, after the New Year is over, remember to go to Fields, at Bersenberg, and prepare to get your mathematics award. Our country needs this award. Remember this matter."

Chen Fan nodded.

"In addition, the status of a professor has been fixed. Don't do your studies in the classroom. I think you should also recruit a few of your own students. This is the core."

"Isn't it? I'm only sixteen years old."

"Do you still know you are sixteen?"

Drinking tea, Hua Xiong was chatting comfortably. Chen Fan was holding his head a little helplessly. It seemed, indeed, a little bit unlike a sixteen-year-old.

"In addition, in your village, someone suggested that it seems that you have to plan here, keep the original foundation, and then build an academic exclusive mountain village. Don't worry, you will compensate for the land."

"what?"

"Because of you, everyone feels that you can build an academic resort. Your village does not need to go to work. This plan will be implemented soon and the construction will be very fast. In fact, it is for your consideration. This plan, I had an idea for a long time, but I lacked a point."

"what?"

"A point that can attract countless scientists, a point that can attract countless scientists, and your appearance is exactly the same. No one is more suitable than you."

The world comes for you, this is the core.

However, Chen Fan didn't care about this. It was really a headache for him to teach his status and recruit people.

Go to class and then go to read the paper.

"All of this needs to be done, Chen Fan. It is impossible for you to do everything alone. It is possible for everyone to act together."

Chen Fan took it down.

Tao Yaoyao cleaned the fruit and gave it to everyone.

Talking and laughing, I passed this year happily.

At the end of the third year of the junior high school, special personnel came to conduct address exploration. The governor personally came over. He asked people to pay the money. You know, so many big guys come to this province. This is a great thing in itself. .

Chen Fan did not participate. Chen Fan drove back to Peking University to conduct his own follow-up research.

The ns equation is like a thorn, pressing in Chen Fan's heart.

Always ponder to untie it.

The sun is good, and the two women outside the laboratory are basking in the sun.

It's pretty good to get some sun in winter.

"By the way, I heard that there seems to be something wrong with Tsarist Russia?"

"what happened?"

"There is an Internet celebrity belt rhythm, saying that it challenges the cold, but because of this incident, many people have frozen to death."

At this moment Chen Fan walked out of the house and took a breath of fresh air.

"Under compression, its scale is also small, on the order of several molecular mean free paths. However, when the continuum assumption is used to calculate the flow field in the shock wave, the calculation results can still be relatively reasonable and consistent with the actual situation. It brings a basic guarantee to the research and resolution of shock wave problems; the second is that the average free path of motion of molecules is particularly large. The average free path of motion of molecules refers to the average value of the collision distance between two molecules. The effective diameter is related to the speed of molecular motion. Macroscopically speaking, the higher the temperature and the greater the pressure, the greater the average free path of molecular motion. At high altitudes, the pressure is very low, and the free path may be very large, and it may be as large as that of an aircraft. The scales are similar, so the assumption of continuum is invalid. At this time, the rare gas effect must be considered. In the case of a laminar boundary layer, there is an approximate relationship between the average free path of molecular motion and the boundary layer...

Crazy, this man is out of help.

Anna said: "What's the use of studying this? You know, Mersenne prime numbers, at least a little progress, no results, everyone has studied the general direction of use, ns equation, where is it used now, no one knows , Macroscopically, the results have already come out."

"There is a fart use, that thing is useful in the macro, but not easy to use by the onlookers, it is a garbage equation."

Tao Yaoyao got up and looked helplessly at the two people arguing, she was a little helpless.

The two quarreled every day.

"Don't forget about this matter."

Chen Fan nodded.

Leaving with Tao Yaoyao.

Today Chen Fan needs to interview students. There are more students. Chen Fan needs a long time. There is only one hour a day, which is a week.

This week, Chen Fan needs to meet many people.

Sitting in the classroom, Hua Xiong sat aside with a few professors, helping with the audit.

Chen Fan was using the draft paper to calculate.

"From this relationship, it can be found that when the Mach number is very large but at the same time the Reynolds number is very small, the small scale of the flow field may reach the level of the average free path of molecular motion lmd. It can be imagined that most of us can observe In the case of, the results of the above formulas are all very small, satisfying the assumption of continuum. The situation where this formula does not hold is at the outer edge of the atmosphere. At this time, the average momentum exchange between atmospheric molecules decreases, resulting in a very small viscosity and a very low Reynolds number. High, so the calculation result of the formula is drastically reduced, which leads to the invalidation of the continuum medium hypothesis

Subsequently, Chen Fan scribbled down some formulas.

Tao Yaoyao took a look, got up and said, "Let's let people come in."

The one who came first was Qiu Xiaomeng with a smile on his face.

Chen Fan raised his head and waved directly, Qiu Xiaomeng happily jumped.

She must come. It is really fun to do research with Chen Fan.

Tao Yaoyao looked at this silly girl, this girl, like Anna, started to like her boyfriend.

This is impossible. Who makes Chen Fan excellent?

The second one who came in was a handsome guy, and brought up the paper he wrote.

Chen Fan glanced, looked at this person, and said, "You seem to be digging a hole for me?"

Tao Yaoyao was also a little angry, Hua Xiong said: ‘Wait for me, I’ll take care of it. ’

Tao Yaoyao said, "I will go out with you."

Hua Xiong nodded.

The boy in the room looked blank.

Outside the door, Hua Xiong picked up the phone and called the admissions office.

"Who is in charge of Chen Fan students?"

"It's me, what's the matter?"

"Are you doing disgusting things with me?"

Tao Yaoyao signaled Hua Xiong to give her the phone, and Hua Xiong handed it to Tao Yaoyao.

"Dear Director Zhang, I think you must have taken a lot of benefits before you squeeze in those students, but you really seem to underestimate Chen Fan."

"Who are you?"

"I mean it's not important. What I said is what Chen Fan meant. Chen Fan needs students, not fakers. I now deeply doubt whether your existence is at Peking University in the past few years. The reason for not recruiting students, of course, seems to have something to do with Tsinghua."

"What the hell do you mean?"

"You may think that it's okay to just extract the paper, but if you don't know these, Chen Fan can read it? Or do you think that Chen Fan simply enrolls students and won't go over it in person, or say, Chen Fan At Peking University, you think you can command Chen Fan"?"

This has two meanings, one is for Director Zhang, and the other is for Hua Xiong.

Hua Xiong naturally understands.

Because Huaxiong insists on the idea that Peking University is proud of Chen Fan.

But Hua Xiong believes this, and others don't. Naturally, Hua Xiong also needs to say these things.

"I will deal with it and investigate thoroughly."

Tao Yaoyao said: "I think, let's bring the places that have been screened out together. These days, among the people screened out, talents seem to be a highly probable thing."

"Well, I know."

The first boy was screened out because the paper was copied.

Chen Fan is busy and needs to calculate the ns equation, so he is too lazy to spray.

The follow-up of this student is very miserable, and may be famous by Peking University.

And because of Director Zhang's affairs, many students are involved, but Tao Yaoyao's approach has changed to make everyone confused.

"Are you sure, continue the interview?"

“Although it’s wrong to walk through the back door, it doesn’t mean that you have no talent. I have always believed in this concept because I believe that there are some children who are just not confident and need to go through the back door. Physical fitness makes them afraid. Under physique, they choose to compromise."

Everyone is very convinced of Tao Yaoyao, this woman can stay by Chen Fan's side, not without reason.

One by one students walked in and were screened out.

Let these students feel a little disappointed.

Tao Yaoyao's explanation is very good.

"Although you have been screened out, Chen Fan has read your papers and given recognition, but you did not meet Chen Fan's standards, but other professors will want you."

To comfort people, Tao Yaoyao has always had one.

A girl with dyed hair came in and handed the document to Chen Fan.

Chen Fan subconsciously held his nose, the smell of this girl's perfume was a bit pungent.

Scan the file.

"You wrote it?"

"Yeah, what's the matter?"

"Talk about it, I will listen."

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