抄録
Interfacial phenomena of molten oxides were studied experimentally. Flow patterns on the interface depended on melt depth and the interfacial flows were suppressed under shallow melt conditions. Temperature distributions on the interface of molten LiNbO_3 and LiTaO_3 were stable, and fluctuations of flow patterns almost did not affect the temperature distributions. On the other hand, the temperature distributions of molten TiO_2 depended on the interfacial flows. In order to understand the relation between the interfaical flow and bulk flow, fluid flows in silicone oils were visualized under various heating conditions. A steady and stable spoke pattern was observed under a side heating and bottom insulating condition. The spoke pattern was broken when the temperature difference between the bottom and center of the interface was large. A stability diagram for flow in a vessel with a free interface was presented.
