温度差を有する場の感温磁性マイクロカプセル分散液パッシブ流動の可視化

抄録

In this study, flow field which caused by temperature-sensitive magnetic microcapsules with temperature difference and magnetic field investigated. The temperature-sensitive magnetic microcapsules containing the temperature-sensitive ferrofluid and fluorescent dye were created by the in-liquid drying method. In this experiment, temperature-sensitive magnetic microcapsules were dispersed in water and injected into the visualization channel to visualize the flow caused by the magnetic field. The visualization channel is made of aluminum alloy and glass, and a temperature difference was formed by heating and cooling with a Perche element installed in the channel. Capturing a fluorescence image of the microcapsules when irradiated with laser in the channel, the velocity field of the flow field of two types with and without the temperature difference was visualized by PIV software. When a magnetic field was applied so that there was a difference in magnetic field strength in the channel, magnetic convection was observed. The magnetic convection also observed when there is a temperature difference, an increase in flow velocity due to thermal magnetic convection was confirmed. In addition, clusters were formed near the wall surface of the flow path, and it was observed that they moved along the wall surface. The moving speed of this cluster also increased due to thermomagnetic convection.