Numerical Prediction of Oscillation Behaviors of a Multiphase Core–Shell Droplet During Interfacial Tension Measurement

  • Kaushal J. Sumaria
  • Robert W. Hyers
  • Jonghyun LeeEmail author


Interfacial tension between molten high-temperature materials is to be measured using the electrostatic levitation furnace (ELF) and the electromagnetic levitator (ISS-EML) aboard the International Space Station. A levitated compound droplet of a concentric core–shell structure is excited either by an impulsive electromagnetic field or by a superimposed electrostatic field. The oscillation behavior of the compound droplet is analyzed to measure interfacial tension at the interface of the two phases. In support of the space experiments, a computational fluid dynamic model was developed to characterize the oscillation behavior of multiphase core–shell droplet. The developed model predicted the interfacial tension between molten copper-rich and cobalt-rich phases with a difference of 3.3 pct compared to the values reported in literature. The developed model is being utilized to investigate the influence of various test parameters on measured surface tension and also being extended for molten steel–molten slag systems.



This research has been funded by NASA under Grant NNX14AR85G.


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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2019

Authors and Affiliations

  • Kaushal J. Sumaria
    • 1
  • Robert W. Hyers
    • 1
  • Jonghyun Lee
    • 2
    • 3
    Email author
  1. 1.Department of Mechanical and Industrial EngineeringUniversity of MassachusettsAmherstUSA
  2. 2.Department of Mechanical EngineeringIowa State UniversityAmesUSA
  3. 3.Division of Materials Science and EngineeringAmes LaboratoryAmesUSA

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