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Thermophysical property measurement of material without container is promising technique with high accuracy for high temperature molten state. Microgravity environment is useful to achieve containerless condition, and levitation technique also realizes the containerless processing even on the ground. The purpose of this study is to establish new measurement technique of viscosity for moderate viscous range, which has no conventional measurement methods. In this study, a droplet is levitated by electrostatic force, induced to rotate. The dynamic behavior of levitated droplet shape is observed, and viscosity measurement is discussed by using breakup of levitated droplet depending on viscosity.

Development of Viscosity Measurement Using Breakup of Electrostatic Levitated Droplet by Rotation