We propose a nonlinear fluid model to describe the dust void formation in a magnetic field environment. It is found that the radius of the dust void keeps decreasing as the intensity of the magnetic field increases. Further research shows that the circular motion of ions affects the balance of electric field force and ion-drag force, which is the main reason for the change of dust voids. The Lorentz force of grains theoretically tends to increase the radius of the dust void, but the force is so small that it can be ignored.

中文翻译：

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重新考虑轴向磁场中尘埃空隙的形成

我们提出了一个非线性流体模型来描述磁场环境中尘埃空隙的形成。发现随着磁场强度的增加，尘埃空隙的半径不断减小。进一步研究表明，离子的圆周运动会影响电场力和离子拖曳力的平衡，这是造成尘埃空隙变化的主要原因。晶粒的洛伦兹力理论上倾向于增加尘埃空隙的半径，但这种力很小，可以忽略不计。