Magnetohydrodynamics is mainly used in three aspects: astrophysics, controlled thermonuclear reaction and industry.
Stars and interstellar gases in the universe are both plasmas and have magnetic fields, so magnetohydrodynamics was first developed and applied in astrophysics, solar physics and geophysics. At present, the research topics about the sun include: the nature and origin of the solar magnetic field, and the influence of the magnetic field on the corona, sunspots and flares. In addition, there are the possibility of interplanetary force field, bow shock wave generated by the interaction between solar wind and the earth's magnetic field, the explosion of new stars and supernovae, the origin of the earth's magnetic field and so on.
The application of magnetohydrodynamics in controlled nuclear reaction may make human beings obtain huge energy from deuterium in seawater. For the mixture of deuterium and tritium, the temperature is required to reach 50 million to 65.438+0 billion degrees, and the particle density and confinement time are higher. However, the use of annular magnetic confinement devices shows good applicability and superiority in the study of controlled thermonuclear reactions.
Magnetohydrodynamics is not only related to the development and utilization of nuclear fusion energy, but also closely related to magnetohydrodynamic power generation. The principle of magnetic fluid power generation is to replace the generator rotor with plasma and omit the rotating parts, which can improve the efficiency of ordinary thermal power plants or nuclear power plants by 15 ~ 20%, or even higher, saving energy and reducing pollution.
When the aircraft re-enters the atmosphere, the friction between the shock wave and the air makes the air on the aircraft surface heated and ionized into plasma, so the magnetic field can be used to control the heat transfer and resistance to the aircraft. However, due to the heavy magnetic field device, this idea has not yet been realized.
In addition, electromagnetic flowmeter, electromagnetic braking, electromagnetic bearing theory and electromagnetic shock tube are also the achievements of magnetohydrodynamics in industrial application.
Question 2: What is transparent water in magnetic fluid? When preparing magnetic fluid, the liquid obtained by chemical reaction should be separated and placed on it for a period of time.
The black shiny colloidal solution on the upper layer is magnetic fluid, and the transparent solution on the lower layer is water.
Question 3: What is magnetic fluid separation and its classification? When magnetic fluid, as a separation medium, is placed in an inhomogeneous magnetic field (or the combined field of magnetic field and electric field), the method of separating different substances by using its quasi-weighting property is called magnetic fluid separation method. Can be divided into MHSS；; Magnetohydrodynamic separation (MHDS).
1) Hydrostatic separation method: Hydrostatic separation method is a separation method (flotation or sinking) in which magnetic fluid is used as separation medium and minerals are separated according to different densities and magnetic susceptibility. 2) Magnetohydrodynamic separation: It is a mineral separation method that uses strong electrolyte solution as separation medium, and under the combined action of magnetic field and electric field, according to the difference of density, magnetic susceptibility and conductivity between minerals.
Question 4: What is the score of 10 for 4:MHD audio?
Question 5: how to make ferrofluid ferrofluid is composed of ferromagnetic hungry particles suspended in nano-scale carrier liquid; Its carrier liquid is usually organic solution or water. Ferromagnetic particles are coated with surfactants to prevent them from agglomerating due to van der Waals force and magnetic force. Although they are called ferrofluids, they do not show ferromagnetism by themselves. This is because ferrofluid can't keep its magnetism without external magnetic field. In fact, ferrofluid is paramagnetic, and it is usually considered as "superparamagnetic" because of its high magnetic susceptibility. Ferrofluid is difficult in practical production, and generally requires high temperature and electromagnetic floating conditions.
Ferrofluid (ferrofluid) is a liquid that is strongly polarized in the presence of a magnetic field.
Question 6: What is magnetic fluid and what is its use? Magnetic fluid, also known as magnetic liquid, ferrofluid or magnetic liquid, is a new type of functional material, which has both the fluidity of liquid and the magnetism of solid magnetic material.
Magnetohydrodynamics is mainly used in three aspects: astrophysics, controlled thermonuclear reaction and industry.
Stars and interstellar gases in the universe are both plasmas and have magnetic fields, so magnetohydrodynamics was first developed and applied in astrophysics, solar physics and geophysics. At present, the research topics about the sun include: the nature and origin of the solar magnetic field, and the influence of the magnetic field on the corona, sunspots and flares. In addition, there are the possibility of interplanetary force field, bow shock wave generated by the interaction between solar wind and the earth's magnetic field, the explosion of new stars and supernovae, the origin of the earth's magnetic field and so on.
The application of magnetohydrodynamics in controlled nuclear reaction may make human beings obtain huge energy from deuterium in seawater. For the mixture of deuterium and tritium, the temperature is required to reach 50 million to 65.438+0 billion degrees, and the particle density and confinement time are higher. However, the use of annular magnetic confinement devices shows good applicability and superiority in the study of controlled thermonuclear reactions.
Magnetohydrodynamics is not only related to the development and utilization of nuclear fusion energy, but also closely related to magnetohydrodynamic power generation. The principle of magnetic fluid power generation is to replace the generator rotor with plasma and omit the rotating parts, which can improve the efficiency of ordinary thermal power plants or nuclear power plants by 15 ~ 20%, or even higher, saving energy and reducing pollution.
When the aircraft re-enters the atmosphere, the friction between the shock wave and the air makes the air on the aircraft surface heated and ionized into plasma, so the magnetic field can be used to control the heat transfer and resistance to the aircraft. However, due to the heavy magnetic field device, this idea has not yet been realized.
In addition, electromagnetic flowmeter, electromagnetic braking, electromagnetic bearing theory and electromagnetic shock tube are also the achievements of magnetohydrodynamics in industrial application.
Question 7: What's the difference between magnetic fluid (MF) and magnetorheological fluid (MRF)? The particle sizes of magnetic particles in MRF (magnetic fluid) and MF (magnetic fluid/ferrofluid) are different. MRF is usually 0. 1~ 100 micron, and MF is 1~ 100 nanometer. MF remains stable through its own Brownian motion, and it will not precipitate in theory. Because the particle size of MRF is too large, the particles can not do Brownian motion, and they are temporarily stabilized with dispersant (usually surfactant).
Under the action of external magnetic field, MRF can be used for force transmission.
MF is mostly a key material or fine application in biomedicine.
Question 8: What is magnetic fluid and what is its use? Magnetic fluid, also known as magnetic fluid, ferrofluid method or magnetic fluid, is a new type of functional material, which has both the fluidity of liquid and the magnetism of solid magnetic materials.
Magnetohydrodynamics is mainly used in three aspects: astrophysics, controlled thermonuclear reaction and industry.
Stars and interstellar gases in the universe are both plasmas and have magnetic fields, so magnetohydrodynamics was first developed and applied in astrophysics, solar physics and geophysics. At present, the research topics about the sun include: the nature and origin of the solar magnetic field, and the influence of the magnetic field on the corona, sunspots and flares. In addition, there are the possibility of interplanetary force field, bow shock wave generated by the interaction between solar wind and the earth's magnetic field, the explosion of new stars and supernovae, the origin of the earth's magnetic field and so on.
The application of magnetohydrodynamics in controlled nuclear reaction may make human beings obtain huge energy from deuterium in seawater. For the mixture of deuterium and tritium, the temperature is required to reach 50 million to 65.438+0 billion degrees, and the particle density and confinement time are higher. However, the use of annular magnetic confinement devices shows good applicability and superiority in the study of controlled thermonuclear reactions.
Magnetohydrodynamics is not only related to the development and utilization of nuclear fusion energy, but also closely related to magnetohydrodynamic power generation. The principle of magnetic fluid power generation is to replace the generator rotor with plasma and omit the rotating parts, which can improve the efficiency of ordinary thermal power plants or nuclear power plants by 15 ~ 20%, or even higher, saving energy and reducing pollution.
When the aircraft re-enters the atmosphere, the friction between the shock wave and the air makes the air on the aircraft surface heated and ionized into plasma, so the magnetic field can be used to control the heat transfer and resistance to the aircraft. However, due to the heavy magnetic field device, this idea has not yet been realized.
In addition, electromagnetic flowmeter, electromagnetic braking, electromagnetic bearing theory and electromagnetic shock tube are also the achievements of magnetohydrodynamics in industrial application.
Question 9: What is magnetic fluid separation and its classification? When magnetic fluid, as a separation medium, is placed in an inhomogeneous magnetic field (or the combined field of magnetic field and electric field), the method of separating different substances by using its quasi-weighting property is called magnetic fluid separation method. Can be divided into MHSS；; Magnetohydrodynamic separation (MHDS).
1) Hydrostatic separation method: Hydrostatic separation method is a separation method (flotation or sinking) in which magnetic fluid is used as separation medium and minerals are separated according to different densities and magnetic susceptibility. 2) Magnetohydrodynamic separation: It is a mineral separation method that uses strong electrolyte solution as separation medium, and under the combined action of magnetic field and electric field, according to the difference of density, magnetic susceptibility and conductivity between minerals.
Question 10: What is transparent water in magnetic fluid? When preparing magnetic fluid, the liquid obtained by chemical reaction should be separated and placed on it for a period of time.
The black shiny colloidal solution on the upper layer is magnetic fluid, and the transparent solution on the lower layer is water.