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About this Abstract
Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Materials Research in Reduced Gravity
Presentation Title The Equilibrium Shape of Compound Drop by Liquid Iron and Molten Oxide Under Microgravity Conditions
Author(s) Masahito Watanabe, Reina Sato, Irori Matsumoto
On-Site Speaker (Planned) Masahito Watanabe
Abstract Scope The equilibrium shape of compound droplets is the minimum condition of the total free energy G<sub>s</sub> of surfaces and interfaces. When immiscible liquids form a compound droplet, it changes from a core-shell shape, in which a liquid with low surface tension envelops a liquid with high surface tension, to a Janus shape, in which a part of the core is exposed, due to the relationship between surface free energy and interfacial free energy. We have observed the equilibrium shape of compound droplets of liquid Fe and molten oxide under microgravity. The interfacial tension is calculated from the observed droplet shape using the length of the exposed liquid Fe portion as the h parameter. The total surface free energy G<sub>s</sub>, expressed by the h parameter derived in this study, can be generally applied to measuring interfacial tension from the equilibrium shape of compound droplets of immiscible liquids.
Proceedings Inclusion? Planned:
Keywords Iron and Steel, Process Technology, High-Temperature Materials

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