Effects of sample size on surface-tension measurements of nickel in reduced-gravity parabolic flights

An electromagnetic levitator has been developed at Auburn University in Auburn, AL, to test containerless processing methods for characterizing the surface tension of high temperature, reactive melts. Recent oscillating drop experiments with nickel samples utilizing electromagnetic levitation in the...

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Bibliographic Details
Published in:International journal of thermophysics 1998-05, Vol.19 (3), p.817-826
Main Authors: CHEN, S.-F, OVERFELT, R. A
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Drop formation
Electromagnetic field effects
Exact sciences and technology
Fluid surfaces and fluid-fluid interfaces
Magnetic levitation
Microgravity processing
Nickel
Physics
Surface energy (surface tension, interface tension, angle of contact, etc.)
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
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Summary:An electromagnetic levitator has been developed at Auburn University in Auburn, AL, to test containerless processing methods for characterizing the surface tension of high temperature, reactive melts. Recent oscillating drop experiments with nickel samples utilizing electromagnetic levitation in the low-gravity environment of NASA's KC-135 research aircraft have shown droplet oscillations in the primary mode and at the fundamental frequency. A series of experiments was performed with droplets covering a range of sizes, and the largest samples exhibited the largest deviations from Rayleigh's simple theory. The smallest samples exhibited oscillatory behavior consistent with Rayleigh's theory.
ISSN:0195-928X
1572-9567
DOI:10.1023/A:1022686821870