论文标题
在旋转磁场下的柔性铁磁丝的3D运动
3D motion of flexible ferromagnetic filaments under rotating magnetic field
论文作者
论文摘要
在数值和实验中研究了旋转磁场中的铁磁丝。细丝由与DNA链相关的微米大小的铁磁颗粒制成。发现在旋转场的低频率下，A灯丝与磁场和临界频率超出临界频率同步旋转，它经历了向三维状态的过渡。在这种机制中，灯丝的尖端与磁场在平行于旋转场平面平行的圆形轨迹上同步旋转。该运动的特征发现数值与实验数据相匹配，并使我们能够获得此类丝的物理特性。我们还讨论了磁杆和细丝之间的行为差异以及细丝在混合中的适用性。
Ferromagnetic filaments in a rotating magnetic field are studied both numerically and experimentally. The filaments are made from micron-sized ferromagnetic particles linked with DNA strands. It is found that at low frequencies of the rotating field a filament rotates synchronously with the field and beyond a critical frequency it undergoes a transition to a three dimensional regime. In this regime the tips of the filament rotate synchronously with the field on circular trajectories in the plane parallel to the plane of the rotating field. The characteristics of this motion found numerically match the experimental data and allow us to obtain the physical properties of such filaments. We also discuss the differences in behaviour between magnetic rods and filaments and the applicability of filaments in mixing.
