Surface tension is an essential thermophysical property of liquids, and the oscillating droplet method is particularly effective for investigations involving reactive molten alloys. The Rayleigh equation is commonly used to evaluate surface tension from measurements of the damping frequency response of an oscillating droplet with small deformation, but non-linear effects are expected to arise for larger deformation. This work describes an improved method for interpreting frequency analysis and validates previous numerical simulation and theoretical analyses which predict a decrease in observed frequency at moderate deformation amplitude. Experimental results from microgravity tests are used to determine a correction of the Rayleigh equation to eliminate the influence of finite deformation.
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2 July 2018
Research Article|
July 05 2018
Deformation induced frequency shifts of oscillating droplets during molten metal surface tension measurement
Xiao Xiao
;
Xiao Xiao
1
Department of Mechanical Engineering, Tufts University
, Medford, Massachusetts 02155, USA
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Robert W. Hyers;
Robert W. Hyers
2
Department of Mechanical and Industrial Engineering, University of Massachusetts
, Amherst, Massachusetts 01003, USA
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Rainer K. Wunderlich;
Rainer K. Wunderlich
3
Institut für Mikro-und Nanomaterialen, Universität Ulm
, 89081 Ulm, Germany
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Hans-Jörg Fecht;
Hans-Jörg Fecht
3
Institut für Mikro-und Nanomaterialen, Universität Ulm
, 89081 Ulm, Germany
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Douglas M. Matson
Douglas M. Matson
1
Department of Mechanical Engineering, Tufts University
, Medford, Massachusetts 02155, USA
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Appl. Phys. Lett. 113, 011903 (2018)
Article history
Received:
May 07 2018
Accepted:
June 11 2018
Citation
Xiao Xiao, Robert W. Hyers, Rainer K. Wunderlich, Hans-Jörg Fecht, Douglas M. Matson; Deformation induced frequency shifts of oscillating droplets during molten metal surface tension measurement. Appl. Phys. Lett. 2 July 2018; 113 (1): 011903. https://doi.org/10.1063/1.5039336
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