From Almighty Scholar to Chief Scientist

Chapter 349 Strange phenomenon
"why is that?"

Even Lin Xiao was quite surprised to hear the news.

After an hour of operation of the magnetic fluid channel, the water flow will be disturbed?

Ma Weimin shook his head: "I don't know either, so I'm struggling with this."

"During the process of DNS (direct numerical simulation), I did not find this kind of situation at all, and it turned out that this kind of situation appeared in the actual process."

Shu Qingzong asked, "Is it all an hour?"

"It's not all one hour, some are one hour, some are more than one hour, even two hours, three hours, six hours are possible, basically all happened after one hour." Ma Weimin said .

"Haven't you discovered it before? I remember that there was a team in China who conducted a model study before?" At this time, Director Ma said that the approval of funds for these experiments is also related to his department, so he has also heard of it. : "I remember that it has been running for many days? There is no problem."

Ma Weimin said: "Their pool is self-built, and it's not a submarine, it's just a boat. My model tests are basically carried out in a large experimental pool, which completely imitates the ocean environment. The conditions of water pressure and current Basically different."

"That's it." Ma Gao nodded, expressing his understanding.

After that, he didn't say any more. After all, in front of the three professors around him, although he still has a doctorate degree, if he counted it, he really didn't read as many books as these three professors.

Ma Weimin rubbed his eyebrows, sighed and said, "I have a feeling that this is a new discovery, maybe it has something to do with something hidden in the NS equation."

Shu Qingzong followed suit and shook his head: "According to what you said, it is impossible to really solve the NS equation."

Ma Gaoliang also said with emotion afterwards: "Navier-Stokes equation, how difficult it is to solve this thing, who can solve it?"

However, when Ma Gaoliang said these words, the three of them were taken aback for a moment, and then they all looked at Lin Xiao who was lowering his head to eat.

Lin Xiao took a mouthful of rice, raised his head and said, "Don't say it, the dishes made by this master are quite delicious, I recommend you..."

As a result, after raising his head, he was stunned for a moment, looked at those three pairs of eyes, recalled the topic they had just talked about, and suddenly said speechlessly: "Hey, don't look at me, that's NS equation, I don't know how to do it what?"

"Hey, Professor Lin, let's stop talking about this, you have already solved a Hodge conjecture, isn't it just a NS equation! Fuck him!"

Ma Gaoliang hugged Lin Xiao's shoulder with a smile and started talking.

Lin Xiao suddenly rolled his eyes, "What do you mean, 'isn't it just a NS equation'? Just kidding, these are the seven major problems of the millennium, okay, give you a pen, and you can do it?"

Ma Gaoliang laughed, "Well, forget it."

However, Ma Weimin next to him said at this time: "Professor Lin, no matter what, I still need your help. We are having trouble with direct numerical simulation. The high probability is that direct numerical simulation still cannot perfectly explain the motion of fluid. After all, direct numerical simulation Simulation still has certain limitations, and if we can know the existence and smoothness of the solution of the NS equation, then it will not only be very helpful for my research, but also for the research of other things. .”

Then he also said with a smile: "Of course, I'm not a force to be reckoned with. After all, it's NS equation. If Professor Lin can give me a little help, not to mention unraveling it, a little help is fine."

"If you want me to say, Academician Ma, you just invite Professor Lin to join your research group."

Shu Qingzong next to him laughed.

Ma Weimin's eyes brightened, "Yes, Professor Lin, do you want to come to my research group?"

Hearing this, Lin Xiao thought for a while, then nodded, and said, "Okay, Academician Ma invites me, of course I will come."

"Of course, I can't promise you that joining your research group will help you solve the problem."

"Haha, who doesn't know that Professor Lin has great powers, you can solve any problem in your hands, and it won't take long. I'm looking forward to it."

Ma Weimin laughed.

No matter what, it is obviously a huge help for Lin Xiao to join his research group.

Maybe at that time, this problem that has troubled him for a long time will be solved because of Lin Xiao's joining?

Ma Gaoliang and Shu Qingzong next to him also laughed, and Shu Qingzong said enviously: "Old Ma... I'm talking about Academician Ma, you are so lucky, you can get such an awesome meal here. A boost, I'm also suffering from a headache right now."

"Oh? What's your headache?"

"It's not the microwave weapon, hey, forget it, it's not easy to do, let's eat, let's eat, my food is cold."

The other three all smiled, scientific research, it is a common thing to encounter problems, so they basically didn't care, and continued to eat.

And just like that, the meal is over.

And since Lin Xiao wanted to join Ma Weimin's project, the two of them naturally didn't waste time. After dinner, Lin Xiao went to Ma Weimin's laboratory.

The superconducting laboratory is quite large, and at the same time, many places are considered, especially the application research of room temperature superconductors, so Ma Weimin's laboratory is also quite large.

After entering, you can see that there are about ten people working on the corresponding work. In addition, there are many models in the middle of the laboratory, and there is a magnetic fluid thruster made by CCD-I frame.

Looking at this big guy, Lin Xiao couldn't help feeling emotional.

He didn't even know that this place had been tossed like this.

At this time, Ma Weimin clapped his hands and made everyone in the laboratory look at him. Ma Weimin said with a smile: "I'm here to tell you a good news. Director Lin has officially joined our research group. Are you still welcome?"

Hearing this, and looking at Lin Xiao who was standing next to him, everyone in the laboratory applauded enthusiastically: "Welcome, welcome! Warmly welcome!"

Just kidding, this is the living Lin Shen.

Although they work in the Dingguang Research Institute, because they have been staying in the research institute, they rarely see Lin Xiao. At this time, not only did they see Lin Xiao, but they were even able to work with Lin Xiao. They immediately became happy .

Lin Xiao also smiled and nodded towards these people, and then went to the experimental platform with Ma Weimin.

"Professor Lin, let me show you our recent water experiment and DNS simulation first."

"Our launching tests are all in Wushi. I'm from the Naval Engineering University, and our large-scale experimental pool is also carried out there." Speaking of this, Ma Weimin said: "So if we want to experiment, we may have to go to You should be able to go to Wushi, right? Of course, if you can’t, we can do it too.”

Lin Xiao nodded: "Well, this is no problem."

"That's good. Of course, if you have something that causes inconvenience, it doesn't matter."

Ma Weimin smiled.

"Row."

"Ah."

Ma Weimin nodded, then stopped talking nonsense, and showed Lin Xiao the relevant data of their original experiment.

The first is direct numerical simulation.

Direct numerical simulation of DNS is to directly substitute the predetermined values ​​into the Navier-Stokes equation, and then perform a large number of calculations on the computer to finally simulate the motion of the turbulence model.

However, obviously, this has very high requirements on the computing power of the computer, and once the turbulent flow becomes complicated, it is difficult to obtain the desired results by direct numerical simulation, so it can only be used to simulate relatively simple turbulent flows Model.

"You see, we performed DNS on the turbulence model, and the final result is very stable, and even our nuclear submarine can reach a speed of up to 60 knots."

"Ah."

Looking at the value displayed on this model, Lin Xiao nodded, it is indeed very good.

The current speed of nuclear submarines is about 30-40 knots. If their nuclear submarines can reach a speed of 60 knots, it will be nearly twice the speed. The boats couldn't keep up.

However, next, Ma Weimin opened another file, "This is our last water test, a total of ten times, and every time the situation I said before appeared."

Lin Xiao nodded, opened the file, and read it.

Sure enough, it was normal for the first hour, but there will be problems at some point after that.

Looking at this result, Lin Xiao fell into thinking.

The problem is huge.

Why is there such a situation?
Undoubtedly, this is a very counterintuitive thing.

It has been running stably for so long, why did it suddenly become disordered?
The reason for the electromagnetic field?

Or fluid force?

Immediately, Lin Xiao also felt a little troubled.

Finally, he found a piece of paper from the side, and then began to draw the model and force analysis on the paper with a pen.

Seeing that Lin Xiao was thinking about it, Ma Weimin stood beside him and didn't bother him. For this kind of problem that may involve top-level mathematical problems, although he has made many achievements, he can only leave it to Lin Xiao at this time. This specialist is gone.

When the people around saw Lin Xiao solving the problem, they all gathered around and looked at what Lin Xiao had drawn on the paper.

They all know how difficult the problems they encounter are to solve, so although they seem to have something to do, they are basically fishing.

Now seeing a big shot coming, they are of course very curious.

And that's it, over time.

After a while, Lin Xiao suddenly raised his head and said, "Send your turbulence model, and I'll add something to it."

Ma Weimin immediately sent their turbulence mathematical model to Lin Xiao.

And Lin Xiao modified some items in it, and then put it on the software to start testing.

At the beginning, the turbulent flow in the software was still stable, but after about 1 minute, the turbulent flow suddenly became disordered.

Seeing this scene, Ma Weimin and other people around suddenly showed expressions of surprise.

Lin Xiao found out the reason just after getting started?
But just as they thought about it, the turbulence on the software became more stable.

The audience suddenly fell silent again.

(End of this chapter)