Study on Interfacial Phenomena of Magnetic Fluids
Study on Interfacial Phenomena of Magnetic Fluids
复制标题
磁流体界面现象的研究
DOI：
10.1299/jsmeb.48.735
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Noriyoshi Douhara
中科院分区：
文献类型：
--
作者：
Y. Fukuda;Noriyoshi Douhara
实验研究了正常磁场作用下磁流体的界面现象。首先，在铁胶体W-40和铁胶体HC-50两种磁流体中，研究了透明容器的形状和尺寸对界面现象的影响。容器的横截面形状为圆形、方形和六边形。集装箱的尺寸设置为55mm， 70mm, 85mm。根据本实验计算的临界磁感应值Bc与Cowley & Rosensweig的理论分析所得的临界磁感应值Bc进行了比较，在这些值处开始建立界面现象。最后，对界面上三种变形模式转换产生的迟滞现象，将本观测结果与A. Gailitis的分析结果进行了比较。结果表明，容器的形状和尺寸对界面现象没有影响，实测数据计算的临界值Bc与理论分析一致。同时，用Gailits的分析方法从数学上阐明了磁滞的机理。
The interfacial phenomena of magnetic fluids subjected to a normal magnetic field are studied experimentally. To begin with, the effect of the shape and the dimension of the transparent containers on the interfacial phenomena is examined for two kinds of magnetic fluids, ferricolloid W-40 and ferricolloid HC-50. The cross-sectional shape of the container is made to be circular, square and hexagon. The dimension of the container is set to 55mm, 70mm and 85mm. The critical magnetic induction values Bc calculated on the basis of the present expriment are compared with those obtained from the theoretical analysis by Cowley & Rosensweig, where at these values of Bc the interfacial phenomena begin to be built up. Finally, on the hysteresis in generating the transition between three kinds of deformation modes on the interface, the present observation results are compared with those obtained from the analysis by A. Gailitis. It was concluded that the shape and the dimension of the containers had no effect on the interfacial phenomena, and the critical value Bc caluculated by measured data agreed with that of the theoretical analysis. And also, the mechanism of the hysteresis was clarified mathematically in the manner of the analysis by Gailits.