CAJ | 학술논문

一阶悬浮力是磁性液体传感器的设计关键。利用任意多物理场直接耦合分析软件 COMSOL multiphysics 仿真分析了磁性液体一阶悬浮力，一阶悬浮力在最大偏心距纵坐标为-2.5mm，横坐标在-20~25mm的范围内呈周期分布，其平均值为38.43N。同时对没考虑磁场和流场耦合情况下的一阶悬浮力进行了理论计算，仿真和理论计算均表明一阶悬浮力与偏心距离间存在非线性关系，一阶悬浮力的理论计算结果大于仿真分析结果，偏心距越大，理论计算与仿真分析的结果相差越大。磁性液体传感器的设计应该考虑磁场和流场的耦合作用。
일계현부력시자성액체전감기적설계관건。이용임의다물리장직접우합분석연건 COMSOL multiphysics 방진분석료자성액체일계현부력，일계현부력재최대편심거종좌표위-2.5mm，횡좌표재-20~25mm적범위내정주기분포，기평균치위38.43N。동시대몰고필자장화류장우합정황하적일계현부력진행료이론계산，방진화이론계산균표명일계현부력여편심거리간존재비선성관계，일계현부력적이론계산결과대우방진분석결과，편심거월대，이론계산여방진분석적결과상차월대。자성액체전감기적설계응해고필자장화류장적우합작용。
The first order levitation force is the key factor in designing ferrofluid sensor. The first order levitation force is simulated by COMSOL multiphysics soft in this paper. The result shows that the first order levitation force exhibit periodic distribution in horizontal coordinate from -20mm to 25mm at maximum eccentricity, vertical coordinates -2.5mm, with average value of 38.43N of the first order levitation force. Meanwhile, the first order levitation force was theoretically calculated without considering the coupling between magnetic field and flow field, and nonlinear relationship between the first order levitation force and eccentric distance is confirmed by both simulation and theoretical calculation. The theoretical calculation result is higher than simulated analysis, and more eccentric distance results in larger diference. The coupling of magnetic field and flow field should be considered in design of ferrofluid sensor.