CAJ | 학술논문

磁性液体的浮力原理是磁性液体静力学中最具吸引力的效应之一。浸没于磁性液体中的永磁体受到的浮力大于阿基米德浮力，这个差值称之为磁性液体的二阶浮力。磁性液体的二阶浮力的计算由于涉及磁场计算的复杂性而变得困难。数值计算也有太多的假设条件。用实验的方法首先形象地展示了永磁体在磁性液体中的悬浮，而后测定了在不同直径的圆柱容器中、不同尺寸的永磁体浸没于不同饱和磁化强度的磁性液体中所受到的轴向二阶浮力随永磁体与容器壁相对位置的定量变化关系曲线，分析了不同的因素对这种变化关系的影响规律。
자성액체적부력원리시자성액체정역학중최구흡인력적효응지일。침몰우자성액체중적영자체수도적부력대우아기미덕부력，저개차치칭지위자성액체적이계부력。자성액체적이계부력적계산유우섭급자장계산적복잡성이변득곤난。수치계산야유태다적가설조건。용실험적방법수선형상지전시료영자체재자성액체중적현부，이후측정료재불동직경적원주용기중、불동척촌적영자체침몰우불동포화자화강도적자성액체중소수도적축향이계부력수영자체여용기벽상대위치적정량변화관계곡선，분석료불동적인소대저충변화관계적영향규률。
The buoyancy principle of magnetic fluid is one of the most attractive effect of magnetic fluid statics. The buoyant force suffered by the permanent magnet immersed in magnetic fluid is greater than Archimedes force, and the difference is called the second-order buoyancy of the magnetic fluid. But it is too difficult to directly calculate the buoyancy due to the complexity of magnetic field. Moreover numerical calculation employs too many assumptions. So in this paper the experimental method is adopted firstly to show the suspension of permanent magnet immersed in magnetic, and then to measure the second-order buoyancy received by permanent magnet immersed in magnetic fluid, which depends on the distance between the magnet and the wall of vessel. The influence of the diameter of cylindrical vessels, the size of magnets and the saturation magnetization of magnetic fluids on the buoyancy is also analyzed qualitatively.