Chapter 372: Need manpower

While Connie was on the road with a cooperative research and development agreement, Professor Pablo Herrero also sent a doctoral student to Lu Zhou.
But not to Princeton.
Instead, head to the Salot Institute in California.
With the signing of a cooperative research and development agreement, research on superconducting materials has begun. The two research teams joined forces, and the progress of the project seemed to have wings.
However, even if the situation is good, Lu Zhou did not expect to get results immediately.
The essence of science is trial and error, and there are many more "mistakes" they need to try.
Superconducting materials are only one part of nuclear fusion engineering, but not all of them.
With the launch of the carbon nanomaterial superconductivity project, Lu Zhou also began his theoretical research on plasma.
Regarding magnetically controlled nuclear fusion, both Tokamak and stellarators face common problems. The three core elements are high temperature, high density, and long-term constraints!
The former solutions are still many at present. The more common ones are laser ignition, heating the plasma itself, and exothermic plasma volume compression ... Of course, multiple solutions can be used together.
However, what is really difficult is the high density and long time constraints of the latter two.
Plasma is not a very peaceful thing. According to the formula of Reynolds number Re = ρvd /, the high-density plasma bound by the electromagnetic field has a large Reynolds number. Any slight disturbance will make the entire plasma constitute The system produces turbulent and irregular turbulence.
Relatively speaking, stellarators have certain advantages in confined plasma, and need to consider a lot of disturbance factors less than Tokamak.
However, even with a lot of disturbances, it is still not easy to confine these restless plasmas in a small space.
The power of theory is greater than that.
When there is a reliable and concise theoretical model, even if it is just an easy-to-use phenomenological model, it can have extraordinary significance to the entire nuclear fusion project.
It can be said that, as far as research at this stage is concerned, 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.
This is exactly what troubled the landing boat.
Whether it is the Euler-Lagrange equation or the NS equation, these seemingly concise theories, when used to solve specific problems, the difficulty will increase exponentially.
If it is said that the existence and smoothness of the NS equation is a century problem in mathematics, then the turbulence of viscous fluids that satisfy the NS equation is a century problem in physics.
And the "turbulence of plasma" he studied is part of this century's problem.
The office of the Higher Research Institute, Lu Zhou sitting at his desk, stared intently at the glass steel cup on the table, as if in a daze.
The cup is not large, similar to the lid of a thermos bottle, and the liquid inside is tumbled like boiling water, and white smoke is constantly overflowing from the edge of the cup mouth.
Vera, who came over holding the lesson plan, was about to report on the teaching of the last numerology class, looked curiously at Lu Zhou who was in a daze.
In her impression, Lu Zhou rarely spent time in daze.
"Professor, what are you doing?"
"Looking for inspiration."
Obviously, Lu Zhou was not in a daze, but his thinking was deadlocked.
Staring at the tumbling liquid in the cup, the nib in his hand began to lightly point on the notebook.
Although there is only a short line of equations on it.
[Ρ {? V /? T + (V.Δ) · V} =-ΔP + ρg + Δ2V]
The equation itself is not difficult. The left side is the momentum change rate of the fluid element, and the right is the various forces acting on the fluid element.
However, it is not difficult, it is just the equation itself ...
Vera didn't bother him looking for inspiration, just curiously stayed beside him, staring at the cup on the table together.
Gradually, the white smoke spilling from the mouth of the cup became weaker and weaker, along with the liquid in the cup.
After a while, the liquid in the cup disappeared completely, and Vera blinked and looked closer.
"It disappeared."
"Yes."
Lu Zhou didn't explain anything and motioned for Vera to take a few steps back.
Then he put on the insulated gloves that he threw at the corner of the table, lifted a short and intensive liquid helium bottle from under the table, and poured it into the glass steel cup like pouring wine.
The glass fiber reinforced plastic cup was filled with transparent liquid again, the liquid surface boiled again, and white smoke was emitted.
After lowering the liquid helium bottle, Lu Zhou kept a safe distance and continued to watch the boiling liquid helium in the cup quietly.
Liquid helium at super-low temperature presents a superfluid phenomenon with a viscosity coefficient close to 0 and a Reynolds number approaching infinity, which is considered to be a fluid close to an ideal state.
Although it seems to be more restless than a "still motionless" liquid, from a mathematical point of view, it involves a much smaller amount of calculations.
In a sense, the plasma in a magnetically confined 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 it is not as exaggerated as liquid helium because of the viscosity coefficient.
This also means that its mathematical form is far more complicated than liquid helium in a superfluid state ...
"Professor, why do I feel so cold in the office?"
Sitting at his desk on the other side, Hardy trembled in his arms and looked at Lu Zhou.
"Because I poured some liquid helium." Lu Zhou said something extraordinary, Lu Zhou suddenly thought of something and looked at Qin Yue sitting by the window and said, "Qin Yue, open the window for me. "
"Good professor." Qin Yue put down his pen and opened the window.
After the windows opened, the office became warmer.
Suddenly realizing what was happening, Hardy began silently packing things on the table, ready to slip away.
Noticing his movements, Lu Zhou asked, "Where are you going?"
Holding his backpack in his hand, Hardy smiled awkwardly. "I ... suddenly remembered that there were a few documents that I hadn't finished reading, so I had to go to the library."
"Helium is not poisonous, don't be so nervous," Lu Zhou sighed, and with the gloved hand, took the glass fiber reinforced plastic cup to the window and let it bask in the sun.
By contrast, this thing is more dangerous.
If you accidentally touch your fingers, it is light to freeze a layer of skin.
Back at the desk and sitting down, Lu Zhou suddenly thought of something and looked at Willa.
"Have you studied partial differential equations?"
After thinking about it for a moment, Vera nodded, but shook her head again. "Have studied ... but not much. Is there anything I need to help?"
Lu Zhou thought for a while, then shook his head, "No, let's forget it, you continue the subject of hail conjecture."
There are only three people in Hail's conjecture group. If Willa is removed from the project group, relying only on Qin Yue and Hardy, he may never see the day when the project is completed.
The little girl's expression was slightly lost.
She would like to help the professor.
But sure enough, her ability is still not enough ...
Suddenly thought of another person in his office, Lu Zhou looked at Wei Wen who was sitting on his side from time to time.
"Wei Wen, do you study partial differential equations?"
It seemed that when the professor finally looked at him, Wei Wen pushed his glasses expressionlessly, but his lips evoked a smile.
"Yes, what's wrong?"
Partial differential equations are one of his areas of expertise beyond functional analysis.
At the undergraduate level, he followed Professor Yan and participated in similar research.
Having been to Princeton for so long, now it is finally time for him to wait for this opportunity to show his strength.
He has been preparing for this day too long.
He will use his strength to prove that he is the second strongest presence in this office!
Lu Zhou thought for a while ~ EbookFREE.me ~ said: "I'm going to start another project, about the NS equation."
The radian of the corner of his mouth gradually stiffened, especially after hearing the name of the NS equation, the smile on Wei Wen's face looked like ... not more confident anymore.
However, Lu Zhou didn't notice his expression.
What he needs most now is manpower, even if he can help a little bit.
Of course, Wei Wen alone is not enough. Even if his ability is outstanding, it is only relative to other graduate students.
The forefinger gently tapped on the table, thinking about who else could help Lu Zhou, his eyes suddenly flashed, and he sat up suddenly from the office chair.
"Yeah, why did you forget that person ..."
He whispered to himself, Lu Zhou's voice was a little excited.
If it was him, maybe he could really help himself!