At the same time that Connie was on the road with a cooperative R&D agreement, Professor Pablo Herero also sent a doctoral student to Lu Zhou's side.

Not from Princeton, though.

Instead, head to the Sarot Institute in California.

With the signing of the joint R&D agreement, research on superconducting materials has begun. The two research teams joined forces, and the progress of the project was like a wing.

However, even if the situation is good, Lu Zhou did not expect immediate results.

The essence of science is trial and error, and there are many "mistakes" that they need to try.

Superconducting materials are only one part of the fusion process, but not the whole story.

With the launch of the topic of superconductivity of carbon nanomaterials, Lu Zhou also began his theoretical research on plasma.

Controlled nuclear fusion with magnetic confinement, whether it is a tokamak or an stellarator, faces a common dilemma. The three core elements are high temperature, high density, and long-term constraints!

At present, there are many solutions for the former, the more common ones are laser ignition, there are also heating the plasma itself by electrification, and there are also exothermic compression of the plasma volume...... Of course, you can also use multiple schemes together.

However, it is the latter two that are really difficult – high-density and long-term constraints.

Plasma is not a very safe thing, according to the formula of the Reynolds number Re=ρvd/μ, the high-density plasma bound by the electromagnetic field has a large Reynolds number, and any small disturbance will cause the whole system composed of plasma to produce disordered and irregular turbulence.

Relatively speaking, stellarroders have certain advantages in confinement plasma, and need to consider many less perturbation factors than tokamaks.

However, even with a lot of less disturbance, it is still not easy to confine these restless plasmas in a small space.

The power of theory is great.

When there is a reliable and concise theoretical model, even if it is just a simple image-only model, it can have extraordinary significance for the entire nuclear fusion project.

It can be said that one of the bottlenecks faced by controlled nuclear fusion technology in the theoretical field is that it is difficult to establish a reliable theoretical model for the plasma in a specific fusion device.

That's exactly what plagued the landing boat.

Whether it's the Euler-Lagrangian equation or the NS equation, these seemingly very concise theories increase exponentially in difficulty when applied to solve specific problems.

If the existence and smoothness of the NS equation is the problem of the century in mathematics, then the turbulence phenomenon of viscous fluids satisfying the NS equation is the problem of the century in physics.

His study of "plasma turbulence" is one of the problems of the century.

In the office of the Institute for Advanced Study, Lu Zhou, who was sitting at the desk, was staring intently at the fiberglass cup on the table, as if he was in a daze.

The cup was small, about the size of a thermos flask, and the liquid inside was tumbling like boiling water, and white smoke was constantly spilling from the rim of the cup.

Vera, who came over with the lesson plan and was about to report on the teaching of the last number theory class, glanced at Lu Zhou who was in a daze curiously.

In her impression, Lu Zhou rarely spends his time in a daze.

"Professor, what are you doing?"

"Find inspiration."

Obviously, Lu Zhou was not in a daze, but his thinking was at an impasse.

Staring at the up-and-down liquid in the cup, the tip of the pen in his hand began to light lightly on the notebook.

Although above that, there is only a short line of equations.

【ρ{∂V/∂t+（V.Δ）· V}=-ΔP+ρg+μΔ²V】

The equation itself is not difficult, on the left is the rate of change of momentum of the fluid element, and on the right is the various forces acting on the fluid element.

However, there is nothing difficult and it is only the equation itself......

Vera didn't bother him looking for inspiration, just curiously stayed next to him, staring at the cups on the table.

Gradually, the white smoke that spilled from the mouth of the cup became weaker and weaker, and along with the liquid in the cup, it became less and less.

After a while, the liquid in the cup disappeared completely, and Vera blinked and looked closer.

"It's gone."

"Yes."

Lu Zhou didn't explain anything, and motioned for Vera to take a few steps back.

Then, putting on the insulated gloves he had thrown at the corner of the table, he lifted a short, sharp bottle of liquid helium from under the table, poured it into the glass glass like wine.

The glass glass was filled with a transparent liquid, and the liquid level boiled again, emitting white smoke.

After putting the liquid helium bottle down, Lu Zhou kept a safe distance and continued to quietly look at the boiling liquid helium in the cup.

Liquid helium at ultra-low temperature presents a superfluid phenomenon, the viscosity coefficient is close to 0, and the Reynolds number tends to infinity, which is considered to be a fluid close to the ideal state.

While it may seem more restless than a "stationary" liquid, it is mathematically much less computationally intensive.

In a sense, the plasma in the magnetic confinement vacuum chamber is also a kind of existence with a large Reynolds number. It has a large density ρ and a large diameter d, but because of the viscosity coefficient, it is not as exaggerated as liquid helium.

This also means that its mathematical form is far more complex than that of liquid helium in a superfluid state......

"Professor, why do I feel so cold in the office?"

Hardy, who was sitting at the desk on the other side, shuddered with his arms folded and looked over at Lu Zhou.

"Because I poured some liquid helium." Talking lightly about something terrible, Lu Zhou suddenly thought of something, looked at Qin Yue who was sitting by the window and said, "Qin Yue, open the window for me." ”

"Okay professor." Qin Yue put down the pen in his hand and went to open the window.

After the windows opened, the office gradually became much warmer.

Suddenly realizing something, Hardy began to silently clean up the things on the table, ready to slip away.

Noticing his movements, Lu Zhou asked, "Where are you going?" ”

Holding the backpack for a moment, Hardy smiled awkwardly, "I...... I suddenly remembered that there were still a few articles left unfinished, and I had to go to the library. ”

"Helium is not poisonous, don't be so nervous," Lu Zhou sighed, and with his gloved hand, he took the fiberglass cup to the window and put it in the sun.

It's more dangerous in comparison.

If the fingers accidentally touch it, it is light to freeze off a layer of skin.

Returning to the desk and sitting down, Lu Zhou suddenly thought of something, looked at Vera and said.

"Have you studied partial differential equations?"

After thinking carefully for a moment, Vera nodded, but shook her head again, "Studied it...... But there's not much research, is there anything I need help with? ”

Lu Zhou thought for a while and shook his head, "No, forget it, you continue the subject of the hail conjecture." ”

Now there are only three people in the research group of Hail Conjecture, if Vera is withdrawn from the research group, relying only on Qin Yue and Hardy, he is afraid that he will never see the day when this project is completed.

The little girl's expression was slightly lost.

She would love to help the professor.

But sure enough, her ability is still not enough......

Suddenly thinking of another person in his office, Lu Zhou looked at Wei Wen, who was sitting in the corner of the office, his eyes had been glancing at him from time to time.

"Wei Wen, do you have any research on partial differential equations?"

It seemed that he had finally waited for the professor to look at him, Wei Wen pushed his glasses expressionlessly, but the corners of his mouth were hooked up with a smile.

"Yes, what's wrong?"

Partial differential equations are one of his areas of expertise, in addition to functional analysis.

As an undergraduate, he followed professors at Yan University and participated in similar research.

After coming to Princeton for so long, now it's finally time for him to wait for this opportunity to make a big difference.

He had been preparing for this day for too long.

He will use his strength to prove that he is the second strongest existence in this office!

Lu Zhou thought for a while and said, "I'm going to open another topic, about the NS equation." ”

The curvature of the corners of his mouth gradually stiffened, especially after hearing the name NS equation, the smile on Wei Wen's face looked ...... It doesn't seem so confident anymore.

However, Lu Zhou didn't notice his expression.

What he needs most now is manpower, even if it can help a little.

Of course, Wei Wen alone is not enough, even if his ability is outstanding enough, it is only compared to other graduate students.

Lu Zhou, who was thinking about who else could help with his index finger on the table, suddenly lit up with his eyes and sat up from his office chair suddenly.

"yes, how did you forget that person......

Whispering to himself, Lu Zhou's voice was a little excited.

If it were him, maybe he would really be able to help him!