Misc

Smart fluids whose rheological properties are controlled by externally applied magnetic field are known as magneto-rheological fluids (MR fluids). MR fluids are actively and widely used for various fields such as automotive industry, civil environment, and welfare devices. This article is a review of development of MR fluids and its research history.

This is the review article for application of the ultrasonic technique to magnetic fluids.

アーヘン工科大学の計算機環境について概説した。

This is the review article for tuned liquid dampers using a magnetic fluid.

Magnetic and Magnetorheological (MR) fluids are formed by small magnetic particles suspended in a fluid such as water or oils. In the absence of an external magnetic field, these suspensions behave as a non-Newtonian fluid. When an external magnetic field is applied to these fluids, magnetic dipole moments are induced in the magnetic particles and many clusters of magnetic particles are formed along the magnetic field direction. Since magnetic and MR fluids are opaque, it is very difficult to analyze the inner structure using common optical methods. Ultrasonic propagation velocity and attenuation in magnetic and MR fluids change with the application of an external magnetic field. It seems that the formation of clustering structures influences on ultrasonic propagation properties. Therefore, the author proposed a qualitative analysis of these structures by measuring properties of ultrasonic propagation. In this review article, we summarized our previous experimental results.

磁性流体研磨に関連して，磁性流体中のクラスタ形成評価のために超音波伝播特性計測を利用する事について特集記事として執筆した。