Numerical Investigation for Measuring Molten Slag/Molten iron Interfacial Tension by an Oscillating Drop Technique in the International Space Station

DOI:10.15011/ijmsa.32.320408
Int. J. Microgravity Sci. Appl. 2015p320408
Author
S. UENO, M. KUBO, T. TSUKADA, K. SUGIOKA and M. WATANABE
Organization
Department of Chemical Engineering, Tohoku University, Department of Mechanical Systems Engineering, Toyama Prefectural University, Department of Physics, Gakushuin University
Abstract
The measurement of interfacial tension between molten slag and molten iron under microgravity in the International Space Station (ISS) is planned, where an oscillating drop technique with an electrostatically-levitated compound droplet will be used. In this work, numerical simulations for oscillation behaviors of a compound droplet composed of molten iron core and molten slag shell phases were performed using OpenFOAM, to determine the operational conditions for measuring the interfacial tension under microgravity. Here, the effects of viscosity and radius ratios of shell to core phases on the oscillation frequency of the compound droplet, i.e., on the interfacial tension evaluated from the frequency, were investigated. As a result, it was found that the oscillating drop technique is available to measure the interfacial tension if the appropriate condition of the radius ratio is selected.
Keyword(s)
Numerical simulation, Interfacial tension, Oscillating drop technique, Compound droplet, Microgravity
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Received 6 Sept. 2015, accepted 9 Oct. 2015, published 31 Oct. 2015

© The Japan Society of Microgravity Applicaiton

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