Fluid mechanics is a branch of mechanics. It sounds like it is on the same level as gravity and the like, and is nothing special. But in fact, fluid mechanics involves a very wide range of aspects and its status in the mechanics system is also very high.

From the movement of the ocean to the movement of leaves in the wind, to the human blood and the ups and downs of breathing, they all fall within the scope of fluid mechanics research. In addition, atmospheric circulation, aerodynamics, etc. are also the research goals of fluid mechanics.

Nowadays, human civilization is inseparable from fluid mechanics. From the design of fans to the shapes of cars, submarines and even aircraft engines, the design of high-speed rail, subway and long-distance ships are all closely related to fluid mechanics.

Fluid mechanics also has many subdivided branches. For example, Qin Ke is best at computational fluid dynamics, which is an emerging discipline developed by combining computers, precision experimental instruments and mathematical analysis modeling. In addition, there are aerodynamics, electromagnetic fluid mechanics,

Liquid dynamics, physical-chemical fluid dynamics, multiphase fluid mechanics, environmental fluid mechanics, biological rheology, etc.

Just like the famous physicist from Eagle Country, the master of mechanics who demonstrated "the Taylor-Proudman theorem". Professor Taylor said: "Every specific theory or numerical method is temporary, and for flow

Essential understanding is eternal.”

Fluid mechanics involves a wide range of areas and is highly difficult, especially the problem of turbulence, which is an eternal problem. In addition, it has an extremely extensive impact on human technological civilization. Countless physicists who think they are geniuses plunge into this pit with confidence.

Most of them have never been able to climb out again, or after finally climbing out, they quickly changed their studies to other directions and did not dare to touch fluid mechanics again, so that fluid mechanics is called the "destruction machine of physical geniuses".

By the way, Professor Taylor, whom I just mentioned, also finally "came to his senses" after studying fluid mechanics for decades and changed his profession to study underwater bombs...

On September 3rd, Qin Ke and Ning Qingyun walked into the experimental building of Academician Jiang Weixian and plunged into the bottomless pit of fluid mechanics. What awaited them was whether they would soar to the sky or...

Just sink into this?

——This is the thought that flashed through the minds of many faculty members, graduate students and even doctoral students who witnessed the two people entering Academician Jiang's laboratory building.

…

As the leading academic master of Qingmu University, Academician Jiang Weixian is the chief researcher and lifelong researcher of the National Key Aerodynamics Research Laboratory, a first-level national self-study science winner, and enjoys a high reputation domestically and even internationally.

His academic achievements are even more fruitful. He has produced many far-reaching theoretical achievements in physical materials, fluid mechanics and even dynamics. It is said that the largest self-produced large aircraft in China relied on Academician Jiang in its engine and appearance design.

The research results are finally finalized.

And he is also very good at leading disciples. There are no less than fifty physics experts who have come out from his disciples. Except for a few who have been rated as academicians and national scientists, the rest are all from various research institutes and large-scale scientists.

The person in charge of the laboratory or the core technical backbone has served as the dean of the physics department in various universities, and there are no fewer than ten deans of the physics school.

A great man like Jiang Weixian is naturally a national treasure at Qingmu University. The school gives him the highest treatment and even built a large experimental building for him, which is only for Academician Jiang and his nine research groups.

use.

The name of this experimental building is "Qingmu University Aerodynamics Research Laboratory". It actually includes several research directions, such as physical materials, aerodynamics, and several subdivisions of fluid mechanics. It is a national key level.

research institutions.

Academician Jiang Weixian was waiting for Qin Ke and Qin Ke in his office. He did not exchange greetings after seeing the two of them, and simply said: "When you come, prepare to officially start your internship with the class. I know that you have achieved pretty good results in mathematics."

Achievements, but these glorious achievements were all cleared after coming to my physics laboratory. You are just ordinary trainee researchers. Don't be proud and complacent, let alone feel superior to others, understand?"

Qin Ke knew that this was a necessary "killing stick", and he was not dissatisfied with the teacher's sermons with a straight face. Instead, he said seriously: "We must correct our identities and learn from our seniors with an open mind!"

Ning Qingyun also solemnly made the same statement.

Jiang Weixian's eyes flashed with satisfaction, but he still said with a straight face: "Okay, from today on you are trainee researchers of the 'Air Turbulence and Climate Prediction' research group, and your performance or improvement will be evaluated after one year.

, or be expelled. Even though you are my disciples, you don’t get any preferential treatment there. You even have to be more diligent and work harder than anyone else. Can you do it?"

Qin Ke and Qin Ke said in unison: "Okay!"

Jiang Weixian finally showed a gentle smile on his face: "Then come with me. You will stay in this research group for the next year. I will give you a general introduction to the situation."

According to Academician Jiang Lao, the "Air Turbulence and Climate Prediction" research group to which Qin Ke and Ning Qingyun were assigned has a very short name, but the research content is extremely complex, including: the application of the N-S equation in climatology, atmospheric

Research into the causes of irregular circulation, meteorological forecasts, extreme weather predictions, etc. This research group has a long history and has been established for more than ten years. It is not well-known to the outside world, but it is a key research group that academician Jiang Weixian attaches great importance to and personally leads.

.

The entire research team occupies the sixth and seventh floors of the experimental building, including office conference rooms, lounges, experimental simulation areas, and even a small computer room dedicated to meteorological data processing.

"Teacher Jiang, how much funding do you have for this project each year?" Qin Ke asked curiously.

Generally speaking, academicians also need to apply for project funding. Qin Ke had learned the relevant funding application and reporting procedures when he helped Professor Hu Qingfeng and Professor He Liangfu as project assistants.

Jiang Weixian said calmly: "We will allocate 100 million at the beginning of each year. There is no upper limit. Once the burning is completed, we will report it and the superiors will basically approve it."

Qin Ke: "..."

Ning Qingyun: "..."

What is invisible pretense? This is invisible pretense!

Professor Hu Qingfeng, for example, usually only applies for about 2 million in national funding, mainly for research projects in cooperation with enterprises. Only with financial support from enterprises can he get a relatively exaggerated 5 million funding.

Jiang Wei first poured it, and he said it in units of hundreds of millions as soon as he opened his mouth!

And it’s only the funding for one research group! One research group has an annual funding of 100 million? Are you sure it’s not Japanese yen? And there’s no upper limit?

Sure enough, the boss is the boss!

Such exaggerated funding made Qin Ke even suspect that Academician Jiang Weixian's research group is related to the survival of mankind...

Ning Qingyun also said in shock: "Is it expensive for your research group to conduct experiments?"

Jiang Weixian glanced at the two of them, as if you need to see more of the world: "One or two hundred million yuan a year is a lot of scientific research funding? The electricity bill of a particle accelerator can burn one billion yuan a year, and this is just a small project of mine.

."

Qin Ke discovered that his teacher Jiang looked serious and informal, like a somewhat stubborn old scholar, but at heart he was just like his former high school mathematics teacher Zheng Jianzhou, a person who liked to show off.

How can your research group, which studies aerodynamics and climate, be on par with a nationally important instrument like a particle accelerator?

However, Jiang Weixian's attitude also made both Qin Ke and Ning Qingyun develop a strong interest in the somewhat mysterious and low-key research group they were about to join.

Jiang Weixian took the two of them out of the elevator and pointed to the spacious office to continue the introduction.

There are a total of 155 people in this research group, including 36 at the researcher level, 51 at the associate researcher level, 29 postdoctoral fellows, and the rest are newly graduated or current doctoral students.

Of course, doctoral students can only serve as trainee researchers here, and graduate students... are not even qualified to come in and clean.

This shows that the standards of this research group are very high. It is worthy of being a high-end research group that burns more than 100 million yuan a year.

Qin Ke and Ning Qingyun exchanged tacit glances. They knew that as first-year physics students, they could become trainee researchers like other doctoral students. It was probably the first time in the history of the research team.

Teacher Jiang Weixian said on the surface that "disciples don't get any preferential treatment." In fact, the preferential treatment is quite generous. At least there is no third graduate student in the school who can join this research group.

When Academician Jiang Weixian led the two of them into the office, all the members of the research team who had already received the news had been waiting for a long time at home. They all stood up and said hello: "Academician Jiang!" "Hello, Academician Jiang!"

It can be seen that Academician Jiang’s prestige is very high.

The members of the team are all between 30 and 40 years old, and some of the younger ones are in their twenties, seventies, or eight years old. They are probably studying for Ph.D.s or have just graduated.

Jiang Weixian said calmly: "These are Qin Ke and Ning Qingyun who I mentioned before. I believe you all know them, so I won't introduce them much. From today on, they officially join our research group. They didn't understand anything when they first came. They will follow the class first.

To learn, give them some pointers when you have time."

Warm welcome applause immediately erupted in the office, and countless curious and surprised eyes fell on the two of them, including some scrutinizing glances.

Although Academician Jiang Weixian asked everyone to give more guidance to Qin Ke and Ning Qingyun, most of the people present did not dare to take up the role of guidance, even if their seniority and age were much higher than these two young people.

Not to mention the unparalleled dazzling achievements of these two young people in mathematics. They already have the title of researcher in the Department of Mathematics. The last undergraduate thesis they co-wrote was "Excessive Rainfall Caused by Extreme Weather"

"Detailed Explanation of the Causes of Causes" showed amazing strength. This is one of the problems that has puzzled the research team for nearly a month but has not been able to make a breakthrough, but it was solved by two undergraduate physics students! How embarrassing for them!

What's more, these two students have published three papers on fluid mechanics in national core journals, and no one dares to ignore the achievements they have made in computational fluid dynamics.

Coupled with the fact that Academician Jiang Weixian was a great supporter, even researchers at the level of full professors tried their best to smile at the two of them.

Generally speaking, those engaged in scientific research are relatively simple compared to those engaged in academics, and the atmosphere is still relatively good. Qin Ke and Ning Qingyun also greeted everyone humbly, without any arrogance, and they aroused everyone's favor.

So the welcome meeting was spent happily.

After getting to know each other, the next step is the usual visit.

When they arrived on the seventh floor, they saw the huge climate simulation system that connected the entire floor and was full of technology. After listening to Academician Jiang Lao’s introduction, Qin Ke and Ning Qingjun finally understood why this research team was burning so much money!

This climate laboratory located on the seventh floor has now begun to simulate more than 20 extreme climates, including small hurricane climates with wind speeds of 30 meters per second, extreme rain and snow weather, high temperature and hot arid desert climates, etc. It can also

Set any temperature between degrees Celsius to simulate a snowstorm at minus -35 degrees Celsius.

This is not the only climate laboratory. There are also larger marine climate laboratories in other coastal areas that can simulate small-scale tsunami scenarios.

There is also a lightning field test base in the south, which can use artificial triggering lightning technology to simultaneously measure and collect the sound, light, electricity and magnetic values ​​in lightning to strengthen the protection against lightning disasters in extreme weather, and is even studying how to efficiently dispel them.

Lightning, reduce damage to electronic and electrical facilities and casualties caused by lightning strikes.

In addition, the research team has also maintained a long-term cooperative relationship with the Fluid-Structure Interaction Mechanics Laboratory of Professor Duan Yonggong, where Qin Kening and Qingjun went to intern for a few days.

Moreover, this research team not only conducts research in the laboratory, but also conducts field investigations all over the country, covering deserts, oceans, peaks, snow-capped mountains, canyons, etc...

So there are only seventy or eighty team members present today, and the rest have gone out for field inspections.

"The main method we are currently researching is to divide the predicted area into grids in time and space, and use finite difference, finite volume, finite element and other methods for data processing. For example, using a semi-Lagrangian semi-implicit format, and then using

The spectral method solves the discrete three-dimensional cubic grid of space. You should all have learned these in elective courses, so I will not go into details. In addition, the air turbulence phenomenon is studied through the Navier-Stokes equation (N-S equation), and

Predict, prevent and resolve extreme climate.”

After listening to the introduction, Qin Ke and Ning Qingyun once again had a deeper understanding of the research group they joined. Qin Ke asked thoughtfully: "Teacher Jiang, is the N-S equation the main tool? Regarding the N-S equation, what is your research progress?

How's it going?"

He was really interested in knowing how far the country's top fluid mechanics experts had gone in their research on the N-S equation.

Jiang Wei nodded and said: "Yes, the N-S equation is one of the main tools we currently use. You said before that you want to study the N-S equation. You should know that for fluid mechanics, any meteorological process is the result of the N-S equation under specific initial conditions.

A solution, but in reality there are many complex interaction factors between physics, chemistry and the environment involved in meteorology. I want to completely use these factors as the 'source terms' of the N-S equation and use the thermal process of energy conservation to solve it.

It is currently impossible to predict accurate values ​​for temperature, weather, and rainfall.”

He paused and then said: "Unless we can solve the problem of existence and smoothness of the solution to the N-S equation. But this problem is too difficult, and we can only find some solutions under specific circumstances after decades of research.

If in the future a genius who is proficient in both mathematics and physics can crack all the solutions to the N-S equation and solve the problem of its smoothness, it will be of immeasurable benefit to the future of mankind."

When he finished speaking, he looked at Qin Ke and Ning Qingyun with infinite expectations in his eyes.

In his opinion, as long as his two students, who have talents far beyond ordinary people in mathematics, can study fluid mechanics with him for ten or eight years, they will definitely be able to greatly advance the progress of cracking the N-S equation.

Come on, Qin Ke, Ning Qingyun, maybe your progress is related to the future survival of mankind.

/

Please remember the domain name of this book:. Novels of Strange People of the Republic of China
Chapter completed!