ドライＭＲ流体のせん断流れモードでの粒子クラスター挙動の可視化観察

抄録

In order to develop of MR fluid of extremely low no-field viscosity and higher operating temperature, we have fabricated novel "dry MR fluids", and have measured and evaluated the fluidity and MR properties. The dry MR fluid is a novel MR fluidic powder, which is mainly composed of micron-sized carbonyl iron particles coated with nano-sized particles without liquid medium. In this study, the formation and breaking behavior of the particle cluster or column in shear flow mode of the dry MR fluids have been visualized using the developed magnetic field applicable MR fluid shear flow device consisting of circular gap between rotational and fixed disks, and the behavior has been investigated in close relation to the measured fluidity and MR properties of the dry MR fluids. The developed MR fluid shear flow device successfully performed the visualization of the formation and breaking behavior of the particle clusters and columns in the shear flow mode of the dry MR fluids.