Study on Formation and Stability of Virtual Channel Levitated by Strong Magnetic Field

强磁场悬浮虚拟通道的形成及稳定性研究

基本信息

批准号：
14550159
负责人：
YAMANE Ryuichiro
金额：
$ 2.3万
依托单位：
Kokushikan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550159/
关键词：
Magnetic fluid Functional fluid Diamagnetic fluid Magnetic levitation Non-contacting suspension Virtual channel Magnetic suspension Cuspidal magnetic field

项目摘要

In the processing of the highly pure material and chemically active material, the levitation and the positioning of objects without contact to the wall is most desirable. It is known that the diamagnetic material can be levitated by the strong magnetic field.By placing two infinitely long north poles face to face each other, a non-uniform magnetic field, which is the weakest at the center and is gradually stronger in the radial direction, is produced. When the magnetic field is strong enough, the non-magnetic fluid can stay at a place around the center line of the magnetic field stably just as if it is in a virtual pipe, and is levitated as a long liquid column or may even flow inside the pipe.In order to produce the magnetic pipe in the air or in the vacuum, the very strong magnet is needed, which makes the experimental study very expensive and hard. With the help of the magnetic fluid as a surrounding fluid, the gravity of the levitated non-magnetic liquid can be balanced with the buoyancy and the magnetic force. This makes it possible to levitate stably the non-magnetic liquid even in the weak magnetic field, which is much less expensive and easier to be obtained. In the present research this principle was used to produce the liquid column and the virtual channel.As the magnetic pipe is the virtual one, formed not by the solid wall but by the magnetic field, the levitated liquid column can be deformed or displaced from the equilibrium position, and the waves can occur along the liquid column.The stability of the levitated diamagnetic fluid column against the disturbance exited magnetically was investigated.The divergent virtual channel was produced with the inclined magnets, and the curved virtual channel with the curved magnets. The water could be made to flow successfully inside of them.

在高纯度材料和化学活性材料的加工中，最理想的是物体的悬浮和定位而不接触墙壁。众所周知，强磁场可以使反磁性物质悬浮起来。通过将两个无限长的北极面对面放置，产生一个不均匀的磁场，该磁场在中心最弱，在径向逐渐增强。方向，产生。当磁场足够强时，非磁性流体可以稳定地停留在磁场中心线周围的地方，就像在虚拟管道中一样，并悬浮成长液柱，甚至可以在内部流动。为了在空气或真空中制造磁性管，需要非常强的磁铁，这使得实验研究非常昂贵和困难。借助磁性流体作为周围流体，悬浮的非磁性液体的重力可以与浮力和磁力平衡。这使得即使在弱磁场下也能稳定地悬浮非磁性液体，而且成本更低且更容易获得。在本研究中，这一原理被用来产生液柱和虚拟通道。由于磁管是虚拟的，不是由实体壁而是由磁场形成的，所以悬浮的液柱可以变形或从液体中移动。研究了悬浮反磁液柱在磁力干扰下的稳定性。利用倾斜磁体产生发散的虚拟通道，利用弯曲磁体产生弯曲的虚拟通道。水可以在它们内部成功流动。