I would like you to tell me how to study binary stars with fluid mechanics. 25

It seems to be called "Loch Lobe".

It indicates that the binary star absorbs matter around the common center of mass

I don't remember very clearly!

Deng Jiaxian (1924-1986), a member of the Jiusan Society, an academician of the Chinese Academy of Sciences, a famous nuclear physicist, a pioneer and founder of China's nuclear research and development, has made important contributions to the research and development of China's nuclear and atomic weapons.

Deng Jia is a descendant of Deng Shiru, and his father Deng Yiyu is a university professor. Deng Jiaxian graduated from the Department of Physics of Southwest Associated University in 1945 and later taught at Peking University. In October 1948, he went to study in the Department of Physics of Purdue University in the United States, and received a doctorate in physics in 1950 at the age of 26.

On the ninth day after receiving his doctorate, he decided to return to China and boarded the passenger liner Wilson**.

He joined the Communist Party of China in 1956, served as the director of the Theoretical Department of the Ninth Research Institute of the Second Machine Ministry in the autumn of 1958, the vice president of the Ninth Research Institute of the Ministry of Nuclear Industry in 1972, and the president of the Ninth Research Institute in 1979, and appointed Deng Jiaxian as the deputy director of the Science and Technology Committee of the Ministry of Nuclear Industry on April 9, 1982, and the Military Commission appointed Deng Jiaxian as the deputy director of the Science and Technology Committee of the Commission of Science, Technology and Industry for National Defense in June 1986.

Member of the 12th CPC **. Deng Jiaxian had been exposed to plutonium used to make his nuclear device after a failed nuclear bomb drop test in 1979, and died of rectal cancer in 1986 from long-term radiation damage.

In the research of atomic bombs and hydrogen bombs, he led the basic theoretical research on detonation physics, fluid mechanics, equation of state, neutron transport, etc., and carried out a large number of simulation calculations and analyses of the physical process of the atomic bomb, taking the first step in China's independent research on nuclear power. He led the completion of the theoretical program of the atomic bomb and participated in the detonation simulation test of the nuclear test.

After the successful test of the atomic bomb, forces were immediately organized to explore the design principles of the hydrogen bomb and to select a technical approach. During his lifetime, he participated in a total of 32 nuclear tests conducted by China, including 15 of which he personally commanded the test team in Lop Nur. Deng Jiaxian was an important pioneer and founder of China's nuclear industry, and made outstanding contributions to China's nuclear science cause, known as the "father of the two bombs".

Deng Jiaxian's Brief Background:

Deng Jiaxian (1924-1986), academician of the Chinese Academy of Sciences, China's outstanding scientist, China's "two bombs" father, graduated from Southwest Associated University and Purdue University in the United States with a doctorate in physics, and returned to the motherland in 1950; He participated in the organization and leadership of China's nuclear research and design work, and was one of the founders of China's nuclear theory research work.

Deng Jiaxian was born on June 25, 1924 in a scholarly family in Huaining County, Anhui Province. In 1999, the Communist Party of China's **, ***, and ** Military Commission posthumously awarded him the "Two Bombs and One Star" Meritorious Service Medal. Deng Jiaxian has successively served as an assistant researcher and associate researcher of the Institute of Modern Physics of the Chinese Academy of Sciences, the director of the Theoretical Department of the Ninth Research Institute of the Second Ministry of Machinery, the vice president and president of the Ninth Research Institute, the deputy director of the Science and Technology Committee of the Commission of Science, Technology and Industry for National Defense, and the deputy director of the Science and Technology Committee of the Ministry of Nuclear Industry. Deng Jiaxian was also elected as a member of the 12th National Congress of the Communist Party of China.

Deng Jiaxian was the main organizer and leader of China's nuclear research and development, and 13 years after his death, he was posthumously awarded the "father of the two bombs". Deng Jiaxian has always been on the front line of China's first-class manufacturing, led many scholars and technicians, successfully designed China's atomic bomb and hydrogen bomb, and led the Chinese nation's national defense and self-defense to the world's advanced level. In 1967, he personally participated in the development and testing of China's first hydrogen bomb.

In 1982, he won the first prize of the National Natural Science Award, in 1985 he won two special prizes of the National Science and Technology Progress Award, in 1986 he was awarded the title of National Model Worker, and in 1987 and 1989 he won one special prize of the National Science and Technology Progress Award.

In 1999, he was posthumously awarded the "Two Bombs and One Star Meritorious Service Medal". Because of his great contributions to China's nuclear science cause, he is known as the "father of the two bombs".

Comrade Deng Jiaxian was exposed to nuclear radiation during an experiment, suffered from cancer, and unfortunately passed away in Beijing on July 29, 1986, at the age of 62.

1. Graduation assignment. 2. The work is relatively stable. 3. It is necessary to prepare teaching materials, students, and teaching methods in the work.

It is required to have love for students, loyalty to education, and enthusiasm for the profession. 4. The focus of the work is to teach students knowledge and how to be useful to society and the country. 5. To study pedagogy and psychology to understand the psychological state of students.

6. With the current situation, I am more optimistic about this profession, which is a profession that should be respected by the world. 7. Teach students to be human beings, and teach students knowledge is success. The difficulty at work is the challenge of yourself.

8. There is no liking or disliking, only responsibility for work and students. 9. I have a clear name and two sleeves are clean. 10. Accept this job with a normal heart and treat this job with the greatest sense of responsibility.

11. As a college student, you should use your spare time to enter the society and exercise yourself, so that you can enter the role in the job as soon as possible and adapt to the rapid development of society. 12. Being recognized by school leaders, respected by students, and making some small achievements in the work is the biggest gain as a teacher. 13. The ideal of serving the motherland with what he has learned can be realized.

In fluid mechanics, it refers to dynamic viscosity, which is the coefficient of internal friction that characterizes the viscosity of a liquid.

Dynamic viscosity, also known as dynamic viscosity, absolute viscosity or simple viscosity, is defined as the ratio of stress to strain rate, which is numerically equal to the internal friction force generated by the interaction of fluids between two plates with an area of 1 and a distance of 1 m apart at a speed of 1 m s when they move relative to each other. Unit: n·s (Newton-seconds per meter) and pa·s (pa·s).

Generally, it can be obtained by looking up the table directly, or it can be obtained by calculating the kinematic viscosity v, = v, where is the density of the liquid.

Just learn to apply the basic concepts, the concepts are the most important.

The first is what you want to do, what you want to study, and build a realistic computational geometric model based on it, and the model may be different depending on the research content. The second is the basic concept of numerical computing... What is the grid for, what kind of grid should be, turbulence.

Find an example to practice and then make your own. If.

If you can't do it in a month or two, don't do it.

It's not about learning well first and then doing it, it's about learning while doing it, and it's useless to just talk about it and not practice.

The reason why there is pressure in water is because the water is affected by the gravitational pull of the earth, which causes the forces between the molecules, especially the water to the wall and bottom of the barrel. When falling freely from a high altitude, it is in free fall, and the gravitational pull of the earth on the water makes it move in free fall with an acceleration of g, so that no other forces will be generated on the barrel wall, barrel bottom, etc., and all the forces are only external forces (i.e., surface pressure).

The inertial force proposed in the book is based on the perspective of a non-inertial coordinate system (accelerated motion coordinate system), at this time, the coordinate system is placed on the moving water and the bucket, at this time, it will be found that the water and the bucket are stationary in the moving coordinate system, but the water and the bucket are subject to the gravitational pull of the earth, and there is no other force, which produces an imbalance, for which an inertial force is added in, and this inertial force is the result of the accelerated operation of the coordinate system, and the magnitude of the imaginary inertial force is equal to the gravity force and the direction is opposite, so that in the accelerated motion coordinate system, it can be found that the action and reaction forces are balanced, so that the water and the bucket are stationary in the accelerated motion coordinate system.

Newton's principle of action and reaction is based on a stationary coordinate system (inertial coordinate system), and in order for Newton's laws to be applied to non-inertial coordinate systems, an inertial force must be added virtually, which is the origin of the inertial force.

It's good to release ten du, but I need to add it (hehe......dao）：

1.The book adds an inertial force ,...... to fluids

It can be understood in this way: at this time, it should be for the convenience of research, the bucket and water are selected as the reference frame, and since it is a non-inertial frame, an inertial force is added. (As to why this force does not produce pressure, I don't understand).

2.The book directly gives the bottom of the barrel force f= 4*d 2*pa,......You can see that the air is under pressure on the top surface of the water and the bottom surface of the bucket, ****************************** hope it doesn't mislead you.

LS on the second floor said that bai is good, that one is called:

Non-inertial is selected.

In the DU coordinate zhi system, the inertial force is added in the DAO standard conversion from an inertial frame to a non-inertial frame. Appearance.

It's too old to forget about orz....

Your second question, well, is in this non-inertial frame force analysis

A total of 3 pairs of balance:

Pair 1: Gravity and the added inertial force.

Pair 2: The pressure of water on the bucket (the magnitude of this pressure = atmospheric pressure * the upper surface of the water) and the atmospheric pressure on the bottom of the bucket (the magnitude of this pressure = atmospheric pressure * the small surface of the bucket).

Pair 3: The atmospheric pressure on the barrel side for a week (the resultant force is 0), this problem should be looked at this way, the system is still balanced

Meandering mushrooms.

Answer; At this time, the water body is weightless relative to the barrel, and its pressure distribution is equal to the atmospheric pressure of each particle point, including all boundary surfaces with the barrel.