"Thirty meters below us, there is a pump-jet propulsion, and my job is to improve its noise at work, enhance its energy efficiency, and enhance its ......reliability," says Pan Guoxiang, "After we have conducted preliminary tests here, if we pass the early experiments, we will take it to the towing pool and water hole for more complex follow-up studies......

"Because my work involves some secrets, I won't show you the relevant information and models......" Pan Guoxiang looked at Gu Xiaobai's curious look, and ruthlessly broke his thoughts, "But Xiaobai, you should understand that my work is very important, so I don't have time or way to cooperate with you." ”

Next to him, the director who accompanied the tour glared at him, can you speak!

Your work is important, and other people's work is not?

Of course, in fact, there is a chain of contempt in the scientific community, but the chain of contempt in the scientific community is not very regular.

Many people feel that their work is important in their bones, and other people's work is a piece of.

For example, now, Pan Guoxiang has this view of Gu Xiaobai.

Of course, for the director, Nochiahan's research is important research.

Now the landlord's family has no surplus food, and it is difficult to find funds.

Gu Xiaobai said: "Can you open it for me to see?"

"This one does. Without waiting for Pan Guoxiang to say anything, the director waved his hand.

The thruster was hidden 30 meters underwater, and they couldn't see it, and they couldn't even hear the sound, which was why they didn't care about Gu Xiaobai coming to visit.

After all, Gu Xiaobai is not a cat or a dog, he is also a top expert in the field of acoustic subdivision, although the work is confidential, but industry communication is also necessary, otherwise it will be done behind closed doors.

A student next to him immediately rushed away, and after a while, the water began to fluctuate slightly.

30 meters of water, basically masking all sounds, only a slight sound of water can be heard echoing.

Gu Xiaobai lowered his head, looked down carefully, and listened attentively.

Pan Guoxiang looked at his serious attitude and felt a little funny.

With such a long distance, and a 30-meter-thick layer of water, it's no wonder what you can hear!

Moreover, many of the noises generated by these underwater thrusters are infrasonic and ultrasonic, which far exceed the limits of human hearing, and it is impossible for the human ear to hear.

He said to Gu Xiaobai: "This is the work we are doing, it belongs to the category of fluid mechanics and hydroacoustics, Xiaobai, you study the acoustics of musical instruments and atmospheric acoustics, do you have any research on fluid mechanics and hydroacoustics? In the physical process of acoustic research, there is only the transfer and exchange of energy, there is no exchange of mass, focusing on the study of the sound energy field, the theories of the two disciplines have a certain degree of similarity, generally speaking, the theory of fluid mechanics can also solve some acoustic problems, so if you want to make achievements in acoustics, you must also come to learn fluid mechanics, it is better to come to my graduate ......"

The more Pan Guoxiang talked, the happier he became, and there was a sense of pointing out the country, but the face of the director next to him was getting worse and worse.

What do you mean by saying that other people's acoustics is a subset of your fluid mechanics? Is this belittling other people's acoustic research? And when you let someone else be your graduate student, you really don't treat the other person as an equivalent scholar, or treat someone else as a student?

Gu Xiaobai nodded and said: "That's right, fluid mechanics and acoustics are still related, fluid mechanics is a branch of mechanics, and acoustics is one of the five basic disciplines of physics: mechanics, heat, acoustics, optics, and electricity, in this regard, acoustics can be said to be the uncle of fluid mechanics......

Pan Guoxiang's face was "brushed", and it turned black.

Who do you say is who uncle?

Boy, I think you want to rebel?

"Your statement is not right, acoustics should definitely be subordinated to fluid mechanics, although in the solution of specific problems, acoustics is its own system, but it is nothing more than simplifying the basic equations and more specific descriptions, the mathematical tools used are the same, you should try to use fluid mechanics, solid mechanics and fluid-structure interaction to engage in acoustics, so that you can ......"

Next to him, Pan Guoxiang's students all increased their quotas with their hands, did the teacher quarrel with Xiaobai?

Why can a teacher quarrel with anyone!

Teacher, please look up at Xiaobai's handsome and glowing face! How can you bear to quarrel with someone Xiaobai!

Wait, did the teacher secretly take off his glasses?

Is this highly myopic now facing a vague luminous mouth cannon? Otherwise, how can he have enough courage?

"Mr. Pan, you are right, fluid mechanics and acoustics are indeed common in many aspects, but this cannot be changed, many aspects of fluid mechanics actually come from the fact of acoustic research...... However, the idea of using fluid mechanics to solve acoustic problems mentioned in you, I think it should be feasible, you can try it. ”

As he spoke, Gu Xiaobai closed his eyes.

At that moment, the speed of time all around him seemed to stand still instantly.

Gu Xiaobai's consciousness entered his memory palace, time was slowed down countless times, and in the huge, factory-like "music room", the smoke was filled, and endless streamers flickered, and the huge factory-style laboratory where Gu Xiaobai was at this moment was slowly emerging on it.

High metal support, deep pool water......

Everything is as it is from the outside world.

The "MV system" given to Gu Xiaobai by the system is actually the most powerful simulator in the world.

It can be completely recorded and intercepted, a real time and space.

Gu Xiaobai stretched out his hand and gently flicked it upward, as if there was an invisible big hand, which instantly moved the space.

In the next second, Gu Xiaobai sank into the water, and in front of him, a huge, rapidly rotating pump-jet propulsion appeared.

Gu Xiaobai's hands were gently clasped together, and the thruster and pool shrank instantly, turning into a plaything in Gu Xiaobai's palm, similar to a wave maker in a fish tank.

And Gu Xiaobai observed this for a while, and as soon as he pulled his hands outward, the thruster was magnified to infinity, and in front of Gu Xiaobai, there was a tiny cavitation generated by the tip of the propeller's blades, which was generated and then burst......

The slowly rotating thrusters are like a huge black hole that can suck into the entire earth.

Behind the black hole, a black mass was staring at Gu Xiaobai unpleasantly.

This system gives you the MV system, you don't shoot MV, you use it to study physics all day long!

How much does physics give you a monthly pass! Why do you do it!

Gu Xiaobai was a little embarrassed to be stared at by the system like this, and sneered: "This, in fact, I am studying musical instruments......

"You think of this big spinning propeller as a huge, water-capable instrument, and now we want to make it as loud and noisy as possible......"

The system stared at Gu Xiaobai, I'm bah, I don't read much, don't lie to me!

"That's it anyway......" Gu Xiaobai spread his hands, "If you don't believe it, you can't ...... it"

The water flowed through the pump jet propulsion, sprayed on Gu Xiaobai's body, and then passed through his body and flowed behind Gu Xiaobai.

Gu Xiaobai's body, in this space, seems to be semi-solid, and every bit of his skin can feel the changes in the flow of water.

Humans can't hear ultrasound and infrasound, but that doesn't mean they can't feel the stress changes they bring.

And now, Gu Xiaobai has obviously turned his body into this kind of receptor.

Gu Xiaobai's consciousness was actually completely connected to this space, and at this time, under his control, the water flowed into silk threads with different colors, but they would never intertwine with each other, and passed through Gu Xiaobai's body.

The sound, however, turned into countless transparent arrows of different thicknesses, radiating in all directions.

He stretched out his hand, and the blades changed slightly with his fingers, length, width, shape, thickness......

Silk threads and arrows are also constantly changing.

And for a moment, it seemed that all the noise was canceled out, and under the low level of floor noise, a constant sound wave came.

"Huh?" Gu Xiaobai's eyes lit up.

He controlled the blade to change slowly, and the pitch to change slowly.

Next to him, the black little black looked dazed, is this thing really a musical instrument?

It seems to be quite fun.

Sure enough, I knew that my host couldn't be so ruthless, take my system, and study physics!

Gu Xiaobai opened his eyes, and several people next to him were looking at him in wonder, not understanding why he suddenly closed his eyes.

"Do you have CFD software?" Gu Xiaobai asked a student next to him.

"Absolutely. "How can you study fluid mechanics without CFD software?

"Then you'll try this later. Gu Xiaobai took out a pen and paper, brushed and wrote.

A long formula, and a long list of parameters that follow.

"Thank you for letting me visit, it's time for me to go back and get ready for the tour. Gu Xiaobai bowed to them again, "Thank you, teachers, brothers and sisters." ”

That's it?

The director sent Gu Xiaobai away, with a disappointed face, and complained to Pan Guoxiang: "It must be that you speak too straightforwardly, which makes Xiaobai angry, and we, the hundreds of people, also want to have a good meal, just a meal......"

Pan Guoqiang didn't speak, and when he returned to the laboratory, he heard the students calling him: "Teacher, teacher, come quickly!"

"Teacher, listen!" The one who called him was a student who called himself Jiangcheng 306, and several of them were sitting in front of the computer, manipulating the simulation software, and humming softly with a deep voice floating in the air:

"Hmph, I'm angry, I'm angry......"

Pan Guoqiang looked dazed, what the hell, did you call me over just so that I could listen to you sing "Hmph, I'm angry"?

If you do this again, I'm going to be really angry!

Just before he got angry, Jiangcheng Wang Haixia hurriedly said: "Teacher, this is the formula and parameters left by Xiaobai just now! It's a musical score, hahahaha, it turned out to be a musical score!"

Next to them, the two female students looked intoxicated: "What a beautiful voice...... It's like a whale singing, is this a little white singing for us?"

Music?

Take the turbulent noise of the pump spray as an instrument to play music?

Can this kid be less unprofessional!!!!!

Tyrannical things, tyrannical things!

Isn't it good to use your talent in a place that benefits the country and the people?!!!!

Pan Guoqiang was so angry that he was about to leave, but he suddenly had a few agitations.

Wait, formulas and parameters?

He lowered his head, grabbed the piece of paper next to him, glanced at the formula, and then silently repeated it in his mind a few times, and his face slowly changed.

The student next to him heard Pan Guoqiang's "hiss-" and took a long, long breath of cold air.

Ah, such a long cold air, it sounds painful!

Teacher's kidney stones are really fierce today!

"Teacher, drink more water!"