Chapter 52
To simplify the application of the Navier-Stokes equations, there are essentially two feasible approaches: one is to completely solve the Navier-Stokes equations and find their general solution; the other is to further simplify the various initial conditions, boundary conditions, and environmental conditions imposed when designing the project.
The first method is certainly the only way to solve the problem at its root. Ji Zhixing does indeed have great ambitions; he is determined to work on the Navier-Stokes equations his whole life.
However, even if he is fortunate enough to solve this millennium puzzle, optimistically it will probably be decades from now.
By then, the members of Zero Gravity Society will probably be getting weak and unsteady on their feet, using canes to walk. Technology will have advanced to who knows how far, and the zero gravity chair may no longer be relevant.
Therefore, Ji Zhixing wisely chose the second method.
However, after repeatedly modifying and adjusting the initial conditions, boundary conditions, and environmental conditions, he ultimately reduced the number of equations by only eight lines. These eight lines, when mapped to a specific structure, could at most compress the 1.7-meter pressure-relieving structure by 0.01 millimeters, which is practically negligible.
A week passed, then two weeks. As time wasted, Ji Zhixing grew increasingly anxious. He felt trapped by those constraints, as if he couldn't break free no matter what.
Another fruitless day. Ji Zhixing left the library with a groggy mind and heavy steps.
He was walking along absentmindedly when he was suddenly drawn to the words "protective gel".
Students chatting as they walked past Ji Zhixing after leaving the library.
"My mom bought one for my grandma as soon as it was released last month to wear as an outer layer. Luckily, she bought it in time, because my grandma was hit by a car but she was perfectly fine!"
"Is protective gel really that effective?"
"Oh, that driver was terrified. My dad was also worried that my grandma might look fine on the outside, but actually have internal bleeding. He took her to the hospital for a full checkup, and all her bones and internal organs were fine!"
"Send me the link, and I'll forward it to my parents so they can buy it too."
After hearing this conversation, Ji Zhixing realized that the protective gel products had already been put into production and launched on the market.
Since Professor Yan sold the patent rights to Huaxia Technology Group, he hadn't paid any more attention to the protective gel, believing the government would take care of everything. Now, hearing the news, Ji Zhixing pulled out his phone to search for related articles and discovered that protective gel products were already widely available.
There wasn't much information available in the military field, but Ji Zhixing noticed that certain specialized police units, such as narcotics officers and counter-terrorism police, had already updated their protective equipment.
The most discussed items in other areas are sports protective clothing made of protective gel, as well as jackets and vests that can be worn daily. Netizens collectively call them "Iron Shirts," and they are highly discussed on various forums.
Has anyone bought it yet? What are your thoughts on using it? Is it very hard?
"It's not hard at all, it's super soft and elastic. My whole family already has two of these."
"My family is the same; everyone from the elderly to the children is all bundled up!"
"My child used to be very hesitant to move when learning roller skating, but after switching to wrist and knee pads made of this material, he doesn't feel much pain when he falls, and now he dares to skate freely!"
"I wish this thing had come out sooner. I broke my leg last month while practicing snowboard big air and I still have a cast on."
"It seems the saying 'The end of the ski slope is orthopedics' will soon be history."
"I threw away the cycling protective suit I bought for 10,000 yuan before. It was thick and difficult to fold, and I had to buy a special side case for it. The Iron Shirt is different. It's flexible, lightweight and thin. I love it!"
"What are all the major mobile phone manufacturers waiting for? Why don't they have mobile phone screens or cases made of this material yet!"
"(Picture) Look how clever I am, I cut a small piece from the Iron Shirt pocket and stuck it on my phone."
"Haha, with this kind of phone case, in the long run, phone sales will actually be negatively affected."
Of course, some people approached it with an exploratory attitude. They were mainly curious as to why the protective gel could exhibit consistent protective performance in different application scenarios.
Ji Zhixing closed his phone and mentally gave himself a thumbs up. The protective gel's ability to adapt so quickly deserved credit.
At that time, based on the experimental results of Yan Jiusheng, Zhao Yi, and Sun Er, he designed three matching schemes. If he had stopped at this step, the final protective gel would have been produced in different models to match different scenarios.
Because of Professor Yan's high standards and requirements, he forced himself to master the algorithms of various solutions, and the protective gel he finally made had a very flexible performance and was not limited by general usage conditions.
Ji Zhixing couldn't help but think of the process he had gone through to simplify various solutions. Back then, he started with the most basic periodic functions and Laplace transforms, and only then did he find a smooth path to simplification.
And now... this path has been tried, but it still doesn't work...
What to do? Ji Zhixing was so worried he was practically balding. He really wanted to consult Professor Yan, but Professor Yan had gone to Beijing to attend an academic conference. It was said that this conference was very important, related to Professor Yan's application for academician. Ji Zhixing felt he shouldn't bother him at this time, so he decided to rack his brains on his own.
Although troubled by the problems of the decompression group, Ji Zhixing, the experimental director of the materials group, did not give up. He would still go to the laboratory when necessary, such as for the weekly seminar.
Unlike the decompression group, the materials group's experiments went very smoothly. The three teams worked together and had already tried all the schemes simulated by the software in the first stage.
At this seminar, Ji Zhixing could see the irrepressible urge to express themselves on everyone's faces, indicating that they had made good progress.
The first speaker was Gong Cheng, whose PPT, as always, had a high-tech feel.
"This week, we conducted further research on the polyethylene fiber we had previously been interested in. We allowed the polyethylene fiber raw material to naturally form in the air due to the temperature difference between -12°C and 210°C, and then injected it into water to wind it into a three-dimensional, bird's nest-like structure according to the water ripples... Based on the final material form, we call it 'air fiber.'"
Gong Cheng's teammate then presented a piece of milky-white, bird's nest-like material.
"I have a 6KG dumbbell in my hand," Gong Cheng said, letting go of the dumbbell and allowing it to fall vertically.
The dumbbell slammed heavily onto the air fiber, bouncing seven or eight times.
"As you can see, air fibers have excellent elasticity and support," Gong Cheng said, taking away the dumbbells and then showing the PPT.
"Most importantly, the compatibility between the air fiber and the simulated pressure relief software is as high as 92.7%. Due to its three-dimensional winding fiber structure, each internal support point can flexibly respond to pressure relief commands, evenly distribute body pressure, and reduce the pressure on the coccyx and lumbar spine in a sitting position..."
Gong Cheng's presentation was met with applause. Satisfied, he closed the PowerPoint presentation and awaited Ji Zhixing's comments.
"Very good!" Ji Zhixing was also very satisfied with this material, which indeed met the requirements of zero-gravity seats. "Continue to improve the fit. In addition, we can pay attention to the fiber strength, molecular weight and modulus obtained under different drawing processes, and try to improve durability and heat resistance."
The second speaker was Yan Ru, who studied the materials from the extremely soft direction to the intermediate degree, and ultimately felt that the initial coated metal nano-soft magnetic materials had the best performance.
"The coercivity, saturation magnetic induction and remanence are all controlled quite stably."
These three aspects were what Ji Zhixing had previously requested, so Yan Ru mentioned the improvement of these aspects as the first point.
"In addition, we also synthesized samples with organic matter encapsulating Ni and CoNi metal particles, and analyzed the morphology, structure and properties of the synthesized samples by XRD, TEM, TG-DTA and other tests. All samples have the advantages of good thermal stability, high resistivity, good soft magnetic properties and not being easily oxidized."
"Very good!" Ji Zhixing nodded and said nothing more. Yan Ru's plan was almost impeccable.
The third speaker was Yi Deng, who couldn't wait to speak. His group had only recently found a feasible solution—a carbon fiber magnetic bead composite material. This material performs just as well as the air fiber from Gong Cheng's group and the nano-soft magnetic material from Yan Ru's group.
The three of them looked at each other, all feeling a little uneasy.
The solutions they submitted this week were the best solutions they found in their group's experiments, but the zero-gravity seat only needs one material for the seat surface.
Next, we'll see which material the club president favors most and select it for focused optimization. Of course, this also means the other two groups are eliminated.
The air in the laboratory was subtly tense. Zhang Yunshu, who was watching from the sidelines, couldn't help but feel worried for Yan Ru. Although she and Yan Ru were the best of friends, to be fair, the materials of the other two groups were indeed very good. It was a difficult choice!
Ji Zhixing carefully considered the three materials before concluding, "Air fiber has excellent breathability and heat dissipation, making it suitable for summer use; carbon fiber composite material has excellent heat storage and insulation properties, making it suitable for winter use. Zero gravity seats can use these two materials respectively, and come in two specifications for winter and summer, allowing users to choose according to the season and their own needs."
He said to Gong Cheng and Yi Deng, "You two groups should continue to optimize yourselves!"
Gong Cheng and Yi Deng exchanged a relieved smile; it was wonderful that their plan had been adopted. Although rejecting the plan didn't mean they would be kicked out of the lab, neither of them wanted their hard work to be wasted.
Xu Dongyang was also very happy. What he thought of was that the zero-gravity seats were available in two specifications, one for winter and one for summer, which meant that under ideal circumstances, the number of people buying them would double!
Yan Ru's heart clenched tightly, and she couldn't help but ask, "What about our group?"
She believed that their group's materials were no worse than the other two groups', and she could even say without any modesty that they were better than the other two groups' materials!
Gong Cheng and Yi Deng immediately stopped smiling, embarrassed that they had laughed too happily in front of Yan Ru.
Zhang Yunshu also looked at Yan Ru with concern. She knew how hard Yan Ru had tried, but now...
Ji Zhixing smiled and said, "I haven't had a chance to say it yet, but your group's materials are actually the best. I was just looking at your experimental report, and based on the TEM results, we can predict that this nano-soft magnetic material is quite skin-friendly in both hot and cold environments."
Yan Ru's anxious heart finally relaxed slightly.
Ji Zhixing continued, "Therefore, I plan to use this material in the second-generation zero-gravity seat and launch it on the market as an upgraded product."
Upon hearing this, Yan Ru's eyes lit up with surprise. Everyone spontaneously applauded for her, and Gong Cheng and Yi Deng were also convinced; this outcome was a happy one for everyone.
Ji Zhixing was still looking at the experimental report that Yan Ru had submitted: "I looked at the TEM results. The metal particles are most evenly dispersed in the carbon medium, is that right?"
“Yes,” Yan Ru replied.
Ji Zhixing said, "Then let's set this direction and continue experimenting to see if we can optimize it further."
The materials team is thriving, but the decompression team, who are just observing, are having a tough time. Their decompression structure is still stuck at a height of 1.7 meters and can't be lowered.
Lin Lang tried to boost everyone's spirits: "The sun will always rise eventually..."
Ji Zhixing was discussing optimization plans with Yan Ru when he heard this and suddenly froze.
After waiting for a while without any response from Ji Zhixing, Yan Ru couldn't help but ask softly, "President, what's wrong?"
Only then did everyone notice that something was wrong with Ji Zhixing.
Lin Lang walked over to Ji Zhixing and gently patted his shoulder.
Ji Zhixing murmured in a daze, "Why does the sun always rise?"
Lin Lang felt a little insecure when asked the question. Wasn't it just because of the Earth's rotation? But Ji Zhixing couldn't possibly not know this basic geographical knowledge.
Yan Ru felt that Ji Zhixing was talking to himself rather than asking questions, as if he was searching for some kind of inspiration.
Ji Zhixing was indeed struck by some sudden inspiration; he felt as if he had glimpsed the key to solving the Navier-Stokes equations.
A note from the author:
The male protagonist's biggest advantage in this story is actually his perpetually bald head, so you don't need to worry about his hair.
The description of "nano-soft magnetic materials" in this article refers to "Preparation and Performance Characterization of Coated Metal Nano-Soft Magnetic Particles", Classification No.: TB383.1;
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