Water Flow Patterns Induced by Bridge Oscillation of Magnetic Fluid Between Two Permanent Magnets Subjected to Alternating Magnetic Field
Water Flow Patterns Induced by Bridge Oscillation of Magnetic Fluid Between Two Permanent Magnets Subjected to Alternating Magnetic Field
复制标题
交变磁场下两个永磁体之间的磁流体桥式振荡引起的水流模式
DOI：
10.1016/j.jmmm.2016.08.036
复制
发表时间：
2017
影响因子：
2.7
通讯作者：
and S.Nix
中科院分区：
文献类型：
--
作者：
S.Sudo;K.Yamamoto;Y.Ishimoto;and S.Nix
本文描述了在交变磁场作用下，两个永磁体之间磁流体的桥式振荡所引起的水流特性。磁性流体桥形成在一对相同的浸入水中的同轴圆柱形永磁体之间的空间中。交变磁场的方向与两个永磁体产生的磁场平行/反平行。磁流体桥对外界交变磁场的响应是简谐振荡。磁流体桥架的振荡产生桥体周围的水流。容器底部有一层薄薄的牛奶薄膜，可以直观地显示水流情况。水流是通过高速摄像机分析系统观察到的。实验结果表明，桥式振荡引起的流型依赖于Keulegan-Carpenter数。
This paper describes the characteristics of water flow induced by the bridge oscillation of magnetic fluid between two permanent magnets subject to an external alternating magnetic field. The magnetic fluid bridge is formed in the space between a pair of identical coaxial cylindrical permanent magnets submerged in water. The direction of alternating magnetic field is parallel /antiparallel to the magnetic field produced by two permanent magnets. The magnetic fluid bridge responds to the external alternating magnetic field with harmonic oscillation. The oscillation of magnetic fluid bridge generates water flow around the bridge. Water flow is visualized using a thin milk film at the container bottom. Water flows are observed with a high-speed video camera analysis system. The experimental results show that the flow pattern induced by the bridge oscillation depends on the Keulegan–Carpenter number.