High-precision surface tension measurements on levitated aspherical liquid nickel droplets by digital image processing

Sauerland, Stefan; Eckler, K.; Egry, Iván

doi:10.1007/bf00729172

Cited by 49 publications

(28 citation statements)

References 5 publications

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“…The different frequencies, ω i , can be identified by employing selection rules. They are based on geometrical considerations and make use of the Fourier transforms of the sum and difference of two perpendicular radii [8]. A typical spectrum, displaying all these frequencies, is shown in Fig.…”

Section: Electromagnetic Levitationmentioning

confidence: 99%

Thermophysical Properties of Liquid AlTi-Based Alloys

et al. 2010

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The surface tension and density of three liquid AlTi-based alloys (AlTiV, AlTiNb, and AlTiTa) have been measured using electromagnetic levitation as a tool for containerless processing. Surface tension has been determined by the oscillating-drop method, while the density was measured using a shadowgraph technique. Both quantities were determined over a wide temperature range, including the undercooled regime. In addition, sessile-drop and pendant-drop experiments to determine the surface tension were performed in a recently built high-temperature furnace. The measured data were compared to thermodynamic calculations using phenomenological models and the Butler equation. Generally, good agreement was found.

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Section: Electromagnetic Levitationmentioning

confidence: 99%

Thermophysical Properties of Liquid AlTi-Based Alloys

et al. 2010

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“…30) Liquid samples perform oscillations around their equilibrium shape. In microgravity, this is a sphere and in that case, simple formulae can be used to relate frequency !…”

Section: Viscosity and Surface Tensionmentioning

confidence: 99%

Physical Property Measurements of Liquid Metals at High Temperatures under Microgravity

Egry¹

2004

Mater. Trans.

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The microgravity environment offers considerable advantages for the measurement of thermophysical properties, in particular for hightemperature metallic melts. The absence of convection and the possibility for containerless processing are the two major benefits. This paper reviews past microgravity experiments dealing with thermophysical property measurements and discusses the methods used. The trend for future microgravity experiments will also be addressed.

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“…In addition, due to the spatial inhomogeneity of the electromagnetic field, the droplet becomes aspherical, which leads to a splitting of the n ϭ 2 frequency mode into as many as five modes (m ϭ Ϫ2, Ϫ1, 0, ϩ1, ϩ2). In an earthbound experiment, [11] a frequency-sum rule, derived by Cummings and Blackburn [7] to obtain the Rayleigh frequency from the split modes, was used in order to calculate the surface tension from Eq. [1].…”

Section: Methodsmentioning

confidence: 99%

Surface tension measurements on liquid metals in microgravity

Egry¹,

Lohoefer²,

Schwartz

et al. 1998

Metall Mater Trans B

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The results of surface tension measurements on liquid metals and alloys, performed in microgravity, are presented. Using electromagnetic levitation and the oscillating drop technique, the surface tension of gold, gold-copper, and zirconium-nickel was measured. We find excellent agreement with available results obtained on earth by the same technique, but only if the latter are corrected to account for gravity effects. This not only shows the necessity for the correction of surface tension data derived from earthbound oscillating drop experiments but also proves its correctness.

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High-precision surface tension measurements on levitated aspherical liquid nickel droplets by digital image processing

Cited by 49 publications

References 5 publications

Thermophysical Properties of Liquid AlTi-Based Alloys

Thermophysical Properties of Liquid AlTi-Based Alloys

Physical Property Measurements of Liquid Metals at High Temperatures under Microgravity

Surface tension measurements on liquid metals in microgravity

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