交流電場により誘起される粒子分散型機能性流体の流動特性(流体工学,流体機械)  [in Japanese] Flow Characteristics of Particle Dispersion Type Functional Fluid Induced with AC Electric Field(Fluids Engineering)  [in Japanese]

The flow characteristics of functional fluid, which suspended micro scale diamond particles in insulated silicon oil, were investigated by microscopic observation and micro particle image velocimetry. This functional fluid has two specific flow structures induced under the high voltage alternating electric field. One pattern of the flow structure consists of a reciprocating parallel flow generated along an electric flux line in one direction between the electrodes under low electric-intensity and high-frequency conditions. The other pattern of the flow structure consists of a rotational flow formed under high electric-intensity and low-frequency conditions. These specific flow structures will contribute actively to a polishing process and to the development of micro fluidic devices in the future. In this study, the electric field conditions to generate the rotational flow structure were discussed. And also the detail structure of the rotational flow was investigated with velocity vector distributions and vorticity distributions.