The military-industrial scientific research system of the academic master.

The next few days passed by as fast as flying.

In almost the blink of an eye, it was March 3th.

According to the competition schedule, the final questions will be announced on time at 3 o'clock in the afternoon of that day, and the answering time will immediately begin.

Total 48 hours.

Submit engineering files and explanatory documents before 29: p.m. on the th.

The scoring rules are basically the same as those for the preliminary round, and the results are determined comprehensively based on calculation speed, result accuracy and submission time.

However, there is no choice between three options, only one compulsory question.

Because there were nearly 70 groups and more than 200 people participating in the finals, the competition was divided into three parts.

All are located in the same convention center building.

Considering that the amount of computing in the final will be much higher than that of the preliminary round, if a personal computer is used to participate in the competition, a lot of time will be spent on waiting for calculation results and trial and error, and it is likely that the final answer will not be available within 48 hours. Therefore, Chang Haonan even specially found a Sugon 3000 supercomputer and allocated part of its computing power for the competition.

As long as the contestants log in to a temporary account and submit the computing task, they can get the results in 1-2 orders of magnitude shorter than an ordinary PC.

Of course, as a final, some necessary sense of ceremony is still necessary.

It certainly cannot be like the preliminary round, where you just refresh the entire website at a certain time and download a PDF and that’s considered the questions.

Instead, all contestants were arranged in a conference room first, and after Chang Haonan announced the questions in person, they went to their respective computer rooms to answer the questions.

It doesn’t matter if you didn’t hear clearly or didn’t remember it, because a set of questions will be pre-loaded in the computer.

At the same time, since the competition lasts more than one day, there are no restrictions on the players' actions.

Even if you are not used to the computers provided by the event, you can bring your own equipment.

Just have to pass the test and register in advance.

Only registered electronic devices can be brought into the computer room.

Furthermore, you cannot take it out before submitting your answers.

It can also prevent cheating to some extent.

After all, numerical calculation is not college entrance examination mathematics, and it is impossible to write the answer on a piece of paper or remember it in your mind.

As long as the storage medium is controlled, most methods will become ineffective...

……

It is said to be three o'clock in the afternoon, but many foreigners do not have the habit of taking a nap.

Therefore, just after lunch time, people started to appear in the venue one after another.

This also includes the trio from Stanford University, Helts and Jameson——

Although the leading teachers cannot intervene in the competition itself, the stage of announcing the questions is included in the opening ceremony of the competition, and it is impossible to exclude them.

However, as a special guest of the conference, Jameson had an exclusive seat on the podium and was definitely not sitting down to listen.

"Honestly, Hertz."

Jameson looked at Heltz who was following behind him and said:

"Before today, I even thought you might not be able to enter the venue..."

This is certainly not a mockery of the latter, but as a representative of COMSOL, Hertz has been working almost non-stop in the past three days, signing letters of intent with nearly 10 industry giants involved in CFD, including software training, database sharing, and priority use of new versions.

Although this cannot be said to have successfully dug into the Torch Group's corner, at least the intention to wield a hoe against the host has been made clear, and the way they are doing it is actually a bit ugly.

In this case, even if you are directly expelled as a troublemaker, others will not be able to say anything.

But in the end, Hertz's application to attend the conference was directly approved, which really surprised the other people.

"To be honest, even I didn't expect it to be so smooth."

Hirsch found a seat in the third row and put his briefcase aside:

"Moreover, this makes me even more suspicious. Are the Chinese trying to set a trap for us in the finals and then make us look bad in public..."

Jameson shook his head decisively:

"probably not."

“Now almost the entire industry’s media and users are watching them. If the topic of the final is too far away from the pre-set CFD theme, then I can raise questions as a special guest, and then no one will look good…”

Lyles Connor sat down at a nearby seat and immediately spoke:

"In addition, in the past month, we have been practicing on our previous weaknesses. Even if we really encounter granular flow or infinite boundary problems in the finals, we will have ways to solve them."

"Even if we take a step back, it's still okay..."

Having said this, he suddenly hesitated.

After making sure there were no outsiders around, he continued in a low voice:

"You can use TORCH Multiphysics to solve the boundary problem during the calculation process, and then use COMSOL to calculate the results, and then submit the engineering file in .cmph format."

“Even if COMSOL is not good at handling this kind of problem, it is only a one-time calculation. How can it not get a convergent result?”

After such repeated persuasions, Hertz, who was originally a little unsure, calmed down again.

Indeed, the preparations on our side were almost foolproof, and we had even prepared many emergency plans in advance.

This includes the kind of substitution strategy that Lyles just mentioned.

Nothing should go wrong.

Thinking of this, Hertz let out a long sigh and prepared to lean back in his chair to recuperate and take a short rest.

Tonight, he has another meeting with Toyota...

The latter returned to F2002 in 1, but as a relatively new team, it was difficult for it to catch up with its rivals in terms of hardware facilities such as wind tunnels in a short period of time.

Therefore, they plan to learn from Ferrari's advanced experience and quickly improve the design efficiency and level of aerodynamic components by cooperating with COMSOL...

……

Soon, the opening ceremony before the final officially began.

It wasn't as lengthy and complicated a process as one might imagine.

After Song Jingming spent about 10 minutes reviewing numerical calculations and, of course, the development history of Torch Group (due to the fact that Torch Group was established too recently, there is really not much history to tell), Chang Haonan actually came on stage to speak as a special guest representative and read out the topic for the final.

This caught many people off guard who had already prepared to be bored for a while.

"Today, I am very happy to see that all the contestants have won the fierce competition from their respective schools, which shows that you are already the best among your peers in this industry..."

"..."

"No matter what the result of today's game is, I hope you can make further progress in the field of numerical computing in the future..."

Chang Haonan stood in front of the stage, neither holding a speech nor looking at a teleprompter. He just held the microphone in one hand and put the other hand in his pocket, pacing slowly.

After a few simple words of encouragement, he turned around and went back to the podium, signaling the staff below to prepare to turn the page on the PPT:

"Then, I will officially announce the topic for the finals!"

The entire venue suddenly became silent.

Everyone was waiting for new characters to appear on the PPT.

"Here, I can reveal in advance that this is a two-phase flow problem."

Chang Haonan kept the secret again.

The audience, who thought he would just say the question directly, let out a "huh~" sound.

It also made the originally dull atmosphere in the conference hall a lot more relaxed.

Just as everyone's voice had not yet completely fallen, Chang Haonan launched a sudden attack:

"5, 4, 3..."

The sound of the count made everyone nervous again.

Fortunately, this time it was not a suspense, but the count really reached 1.

As Chang Haonan's voice fell, the PPT was turned to the next page.

"In the production process of plastic products, microcellular injection molding technology can reduce material consumption, reduce the weight of injection molded parts, improve injection molding thermodynamics, and shorten the molding process cycle. Therefore, once it came out in the 80s, it received great attention..."

"..."

"According to the principle of microcellular foam injection molding, the first step of the process is to prepare a uniform mixed liquid before the melt is mixed and accumulated at the screw head. This is a necessary condition before microcellular foam injection. This requires that the screw mixing section must have corresponding mixing elements to change the position of bubbles from top to bottom and accelerate the diffusion and dissolution of bubbles in the polymer..."

"Now suppose there are two polymer melts A and B, whose specific properties are shown in Appendix 1 and Appendix 2 respectively. Please design a torsion element installed at the front end of the screw to mix the two substances AB..."

"..."

Looking at the topic on the PPT, Professor Jameson, who was sitting on the podium, showed a hint of surprise at first, and then turned to joy.

Although the background of the topic seems a bit unpopular, its essence is nothing more than a two-phase flow mixing problem.

Although the traditional finite volume method is not suitable for solving this type of problem, the latest version of COMSOL uses the Lagrangian method of unstructured grids to solve this problem to a certain extent.

As long as the boundary problem is solved, the solution can be followed step by step as a normal CFD problem.

It will definitely not be a problem for people like Lyles who have received special training from him.

Thinking of this, Jameson even glanced at Chang Haonan behind the podium with a somewhat gloating look.

In his opinion, this should be the trick the other party used in setting questions.

Use boundaries with drastic changes in topology to constrain COMSOL.

But his cleverness backfired.

At the same time, Chang Haonan on the stage was also paying attention to Professor Jameson's reaction out of the corner of his eye.

After seeing the latter's expression and eyes, he knew that this time he had secured victory.

The other party didn't realize the hidden trap in this question at all.

By the time the contestants realized something was wrong, it would have been the morning of the third day, close to the submission deadline.

Even if I wanted to go back and use TORCH Multiphysics to remedy the situation, it would be too late...

In fact, Hertz's previous guess had almost hit the mark.

However, Chang Haonan's methods were much more sophisticated than anyone expected.

Combined with excellent confidentiality measures.

Eventually, this unsolvable conspiracy was brought to the forefront.