Deep Space Fleet

Brother Zhao asked with a little interest, "Do you have any good ideas?"

"Not yet, I just want to know about it."

Zhang Yuan didn't dare to say that he wanted to directly challenge this difficult problem of the century, so that he would be ridiculed for no reason...even though generally speaking, Brother Zhao would not laugh at him, but would just advise him not to take on such a big problem.

Soon, two days passed quietly...

The spacecraft has turned successfully, and the main engine has been shut down abruptly, entering a short maintenance state.

The artificial light source from Europa shone on the light sail, causing the entire mothership to enter a slow deceleration.

Optical path, a great technology.

Because of the existence of this technology, small spacecraft can quickly travel between the moon and Jupiter without having to carry a large amount of fuel. In the past, when the spacecraft traveled from the moon to Jupiter, at least half of the payload had to be used for fuel. But now it’s no longer needed. A small spacecraft of hundreds or thousands of tons can travel from the moon to Jupiter in just one month. This is a huge improvement.

Zhang Yuan witnessed the process of the main engine slowly extinguishing.

It was as if a pot of hot water had been poured out. Without enough temperature, the plasma light gradually went out, and the nuclear fusion reaction automatically stopped.

From this perspective, the nuclear fusion engine is quite safe. It will not explode, it will only go out automatically when the reaction conditions are insufficient.

In the engine room of the Earth Age, only one auxiliary engine and two molten salt piles are left to provide basic electrical energy.

The molten salt reactor is a kind of nuclear fission value-added reactor, which has helped mankind survive the long "grey age". The technology is quite mature, so it is usually used as a backup energy source. For the critically important safety of spacecraft, it is impossible to pin hope on a single fusion energy source.

In the next period of time, relevant technicians will also carry out a series of maintenance on the entire engine.

The internship career in the engine room is temporarily over...

Zhang Yuan returned to the living area in a daze.

He has a few days off to rest, and then he has to go to work at the nuclear power plant. Anyway, there is nothing serious, and he plans to stay at home and read the paper.

Well, for the problem of turbulence, after reading the literature for a few days, he has no idea, after all, it is a world-class problem...

At six o'clock in the evening, a small dinner party is being held at the "big rice bucket restaurant" in District A.

No matter how busy Academician Ding is, he will spare a little time at the beginning of each month to treat everyone to a meal and take care of a few disciples by the way.

"Are you trying to do a turbulence problem?"

"I just want to know..." Facing his teacher, Zhang Yuan said honestly.

Ding Zhaodong smiled, maybe because he remembered when he was young and frivolous, he didn't hit this young disciple.

"It is indeed a difficult and difficult problem. Many people have studied it for more than ten years, but they can't write a particularly good article, wasting time. If you want to write an article in this area, you must be mentally prepared. "

"If you don't understand anything in mathematics, you can ask Brother Luo Wenhao for advice, or you can ask me directly."

Brother Luo sitting on the side is almost forty years old and has already graduated with a Ph.D. He is usually very busy with work and rarely attends such gatherings.

It was the first time Zhang Yuan saw him.

Senior Brother Luo is a talented person, engaged in research in the field of information. However, his direction is biased towards mathematics, and he is quite famous in the study of positive curvature, solving two famous Hopf conjectures.

Why do you say two? Because there are multiple Hopf conjectures, one is "there is no positive section curvature measure on S^2XS^2", and the other is "the Euler characteristic numbers of even-dimensional positive curvature manifolds are all positive".

Two conjectures, he could have won two awards, but he ended up taking it all by himself.

Zhang Yuan was in awe, and had a desire to hug his thigh.

"Senior Brother Luo!"

"Turbulence problem, haha, ambitious! I like to make friends with these young people with ideals. I have also studied this aspect before."

Sitting nearby was Senior Brother Luo's wife, a female mathematician from Languo in her thirties, dressed very elegantly, with a special Victorian flavor.

"Hello. Are you classmate Zhang who owns 300 kilograms of gold?"

Zhang Yuan said with a smile, "Ms. Mo, don't be joking. In fact, I prefer to have 300 kilograms of antimatter, which can be used for experiments."

"Really? The price of antimatter is too expensive... You have a high reputation among the girls in our F area! May I introduce you?"

Zhang Yuan couldn't help feeling a little embarrassed, "Girls from Languo, I already have several options in my address book..."

Everyone laughed.

The atmosphere at the dinner table was very relaxed. Everyone first chatted about personal development in close time, and then chatted about academic gossip, which was quite interesting.

Including some mathematical problems proved by someone; a new breakthrough in condensed matter physics; the famous "Modern Science" journal, because of being found out about academic corruption, its influence has plummeted, and so on.

"There are more and more people with depression. If they are diagnosed, they will disembark on Europa and return to Earth."

"That's it..."

"Modern Science has temporarily suspended its publication, and several review editors have been investigated. They had submitted manuscripts there before...I didn't expect this to happen."

"Academic corruption is possible everywhere. It is also difficult to completely avoid... It mainly depends on the human environment to restrain it."

Zhang Yuan was taken aback. The impact of this journal has plummeted. Could it be related to what happened to him?

However, I found that everyone didn't focus on him in the discussion, so I gradually let go of my heart.

After the dinner, Zhang Yuan discussed a few more words with the newly acquainted Senior Brother Luo.

"The problem of turbulence is mainly in the direction of non-uniform turbulent flow. After I read the paper, the first thing I thought of was Fourier analysis and related integral transformation. Later I found that it was not right..."

This is his intuitive idea.

"Fourier analysis, it's too ordinary." Senior Brother Luo said with a smile: "I thought about it at the time, and later found out that it is only suitable for uniform turbulent flow. Even if it is done, the fitting effect will not be very good, and it doesn't make much sense .”

Zhang Yuan agreed: "It would be good to use it as a test question in the test paper."

Brother Luo slapped his head, as if he had thought of something, "It's not easy to use pure numbers. If it's a direct numerical calculation, I've seen a good idea, using LES and using non-equilibrium and equilibrium respectively. function……"

"The influence of the calculation of various parameters on the wall under the conditions of three different grid divisions, and compare it with the corresponding DNS results... This is an innovative algorithm in the past few years, but in actual application, compared to your My father's calculation is not so good."

Zhang Yuan suddenly had a flash of inspiration, as if he had grasped something, "Grid division?"

"So, can we divide the entire observation results into a certain type of community, and first decompose the entire big problem into small problems..."

"Society?"

Brother Luo was stunned for a moment, "But in the end you still have to merge the whole problem back, otherwise all the data will be meaningless. What is the method of division and merger?"

"This... I haven't thought about it yet."