One-dimensional actuation of a ferrofluid droplet by planar microcoils
One-dimensional actuation of a ferrofluid droplet by planar microcoils
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DOI：
10.1088/0022-3727/42/1/015004
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发表时间：
2009-01-07
影响因子：
3.4
通讯作者：
Nguyen, Nam-Trung
中科院分区：
文献类型：
--
作者：
Beyzavi, Ali;Nguyen, Nam-Trung
本文讨论了模拟的驱动装置的铁磁流体液滴使用平面微线圈。设计了具有两对平面微弹簧圈的装置，并在双面印刷电路板（PCB）上制造。每对都放在PCB的每一侧。底部的线圈使液滴沿着连接它们中心的线运动。顶部的线圈形成了一个虚拟的通道，以限制液滴沿着直线运动。本文首先建立了线圈的磁场模型。利用模拟的磁场，计算了液滴所受的力。数值求解了磁流体液滴在硅油中的运动方程。研究了驱动电流、液滴直径和载液粘度等参数对微弧氧化的影响。理论和实验结果吻合良好的定量和定性。理论和实验结果都表明，较高的磁场强度、较低的油液粘度和较大的液滴尺寸都会使液滴的峰值速度增大。
This paper discusses the simulation of a device for actuation of a ferrofluid droplet using planar microcoils. The device with two pairs of planar microcoils was designed and fabricated on a double-sided printed circuit board (PCB). Each pair is placed on each side of the PCB. The coils on the bottom actuate the droplet along the line connecting their centres. The coils on the top create a virtual channel to confine the motion of the droplet along a straight line. The paper first formulates the model of the magnetic field of the coils. With the modelled magnetic field, the corresponding forces acting on the droplet were calculated. The equation of the motion of a ferrofluid droplet immersed in silicone oil is solved numerically. The influence of different parameters such as driving current, droplet diameter and viscosity of the carrier fluid is investigated. Theoretical and experimental results agree well quantitatively and qualitatively. Both theoretical and experimental results show that a higher magnetic field, a lower oil viscosity and a bigger droplet size will increase the peak velocity of the droplet.