375 It's Time To Have A Happy Liver Explosion Again (2/3)

Chapter 375 It's time for a happy liver explosion again (23)

After a while, the tea boiled.

The dense mist floats on the purple clay pot.

Picking up the teacup and taking a sip, moistening his throat, the old gentleman spoke slowly.

"Among the many problems about partial differential equations, the Navier-Stokes equation is probably the most difficult direction. Except for a few problems, we cannot directly perform partial differential equations constructed by the Navier-Stokes equation. To find a solution, we can only step back and seek an approximate solution.”

"As for the phenomenon of turbulence, as far as I know, the Cray Institute has been researching it, and has invested heavily. However, although some results have been achieved, they are not considered major achievements."

"As for the plasma turbulence you want to study, it seems to me that it is even more difficult. First, the current computer cannot handle the calculation of that magnitude, we can only do approximate solutions. Second, we cannot get Accurate observational data, only inaccurate diagnostic data can be relied on."

Lu Zhou: "Why?"

Old Mr. Qiu smiled: "Because we don't have an effective means of observing ions at isothermal pressure. For example, we take a nanoscale probe and poke it into the general gas to collect the gas molecules. Data, the disturbance of the gas movement by the probe itself can basically be ignored."

"But high-temperature and high-pressure plasmas are different. For mild plasmas, we can use electrostatic probes and magnetic probes, but for high-temperature and high-pressure plasmas, any tiny disturbance may cause the entire system to collapse. The final result is the electromagnetic field Unable to continue confining the plasma, the latter hits the first wall directly."

"Therefore, we can only obtain relevant plasma parameters through the electromagnetic waves emitted by the plasma itself, so as to establish a phenomenological model. However, because the electromagnetic waves emitted by the plasma have a wide spectrum, although the amount of information is large, the information contained in it It is also quite messy, and the phenomenological model established is only accurate within a limited range."

Lu Zhou asked thoughtfully: "Is there a solution?"

"No, this is a technological ceiling." Putting down his teacup, Mr. Qiu shook his head, and continued in a joking tone, "If you can design an experiment to observe high-temperature and high-pressure plasma, your contribution to plasma physics will I am afraid that it is no less than the contribution of cryo-electron microscopy to biology."

Hearing this sentence, Lu Zhou smiled helplessly.

Although the system includes engineering in the level, human energy is limited after all, and he has never studied this field in depth. Even if he got the talent improvement, this improvement did not bring him a more intuitive feeling.

It might be okay to let him design the experiment.

But asking him to design experimental instruments is really beyond the scope of his ability.

"My personal suggestion is, since the experimental tools can't be solved yet, why not try to improve the theoretical tools first?" After a pause, the old man looked at Lu Zhou suspiciously, "It stands to reason that mathematics is your strong point, right? .”

The moment Lu Zhou heard this sentence, he was slightly stunned, and suddenly had a glimmer of understanding in his heart.

Yup.

Mathematics is my forte.

Since experimental tools cannot solve the problem, why not start with perfecting theoretical tools?

For example, the NS equation itself is used as a proposition to conduct research, and the relevant theoretical tools are improved while studying the NS equation. Just like when he was studying additive number theory, if there is no previous series of mathematical propositions as a foreshadowing, let him challenge Goldbach's conjecture as soon as he comes up, there is a high probability that there will be no solution.

Thinking of this, Lu Zhou's thoughts gradually became clear.

In the following time, the problems they communicated were basically concentrated in the field of mathematics.

For the research in the field of partial differential, Mr. Qiu has his own experience.

Although the NS equation is not his research direction, he still has some insights of his own about this century-old problem in the partial differential field. And these insights are also of great help to Lu Zhou.

In this way, the time passed by every minute and every second, and the wall clock on the wall went through two laps unconsciously.

The dense mist on the tea table has long since dissipated, and the tea in the cup has long been cold.

I don't know which cup of tea it is, but Zhao Yi, who is sitting next to him, fidgets and moves his butt.

Listening to the two big guys talking about math problems, he, a doctoral student, couldn't get in a word, and wanted to leave but was embarrassed.

I have to say, this is really a painful thing.

Moreover, this pain does not only come from the spirit, but more from the physiology.

Just now, in order to cover up his embarrassment and ignorance by drinking tea, he accidentally drank too much...

In the third hour, the conversation between the two finally came to an end.

After Lu Zhou bid farewell to Mr. Qiu, Zhao Yi was finally liberated.

When he was going downstairs, he quickly rushed to the toilet. Zhao Yi, who had finished untying his hands, trotted out of the toilet, caught up with Lu Zhou, and asked out of breath.

"Boss, what did you talk about just now?"

Lu Zhou was in a very good mood, and said with a pleasant face: "We talked about some interesting things."

Zhao Yi rolled his eyes and asked, "I heard about controlled nuclear fusion. Is that thing...real?"

If true, that's really shocking.

Lu Zhou didn't answer this question, but instead asked, "What do you mean by 'truth'?"

Zhao Yi was stunned for a while, and described his problem in a general way: "That is, the kind that can be realized."

Lu Zhou said with a smile: "The significance of science is to use scientific methods to realize those things that cannot be realized. Is it still necessary to study the problems that have been solved? Isn't it enough to read the literature? You are already a doctoral student. , why do you still ask such a layman's question?"

Zhao Yi's old face blushed when asked, touched the back of his head, and smiled embarrassedly.

"Boss, I want to treat you to a meal, do you have time for a while?"

Lu Zhou nodded: "Okay."

It's almost time for dinner.

If someone asks him to eat Fa, he will not refuse.

...

After communicating with Mr. Qiu, Lu Zhou was greatly inspired.

As the old man said, before solving problems, it is more important to create tools to solve problems. Compared with the former, the latter is the crux of the problem.

In short, before climbing over this wall, he needs to build himself a ladder.

Before that, what he did was like circling around an insurmountable wall.

After finishing his trip to Harvard, Lu Zhou returned to the hut in Princeton and re-defined his research ideas. He felt that every cell in his body was filled with inexhaustible inspiration.

Can't wait to sit in the study, facing the brand new white paper, Lu Zhou turned the ballpoint pen in his hand and whispered to himself.

"...the establishment of a theoretical model or a more accurate phenomenological model for the plasma requires more accurate observational data rather than diagnostic data."

"Since the experimental tools can't solve it for the time being, let's start with what I can solve!"

After slightly moving his neck, Lu Zhou raised his pen and wrote a line of title on the blank paper.

"Research on the global existence of smooth solutions of three-dimensional incompressible Navier-Stokes equations under specific initial values"

Looking at the title of this line, his eyes were full of enthusiasm.

Next, it's time for a happy liver explosion!