Experimental modulation and theoretical simulation of zonal oscillation for electrostatically levitated metallic droplets at high temperatures

Wang, H.P.; Li, M. X.; Zou, Peng; Cai, X.; Hu, L.; Wei, B.

doi:10.1103/physreve.98.063106

Cited by 17 publications

(5 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Introduced in this work is a refinement of the Faraday forcing method described in 2018 by Brosius et al 15 to include the mode n = 3 in addition to a modified resonance quantification method. The mode n = 3 has been previously observed in electrostatic levitation systems using relatively large ( D > 4 mm) droplets in the investigation of the stability of levitated Zirconium as a function of size and temperature 16 . The current work aims to include the resonance quantification of mode n = 2 and mode n = 3 as a benchmarking method for determining surface tension of a material using just one levitated sample.…”

Section: Introductionmentioning

confidence: 66%

Benchmarking surface tension measurement method using two oscillation modes in levitated liquid metals

et al. 2021

View full text Add to dashboard Cite

The Faraday forcing method in levitated liquid droplets has recently been introduced as a method for measuring surface tension using resonance. By subjecting an electrostatically levitated liquid metal droplet to a continuous, oscillatory, electric field, at a frequency nearing that of the droplet’s first principal mode of oscillation (known as mode 2), the method was previously shown to determine surface tension of materials that would be particularly difficult to process by other means, e.g., liquid metals and alloys. It also offers distinct advantages in future work involving high viscosity samples because of the continuous forcing approach. This work presents (1) a benchmarking experimental method to measure surface tension by excitation of the second principal mode of oscillation (known as mode 3) in a levitated liquid droplet and (2) a more rigorous quantification of droplet excitation using a projection method. Surface tension measurements compare favorably to literature values for Zirconium, Inconel 625, and Rhodium, using both modes 2 and 3. Thus, this new method serves as a credible, self-consistent benchmarking technique for the measurement of surface tension.

show abstract

Section: Introductionmentioning

confidence: 66%

Benchmarking surface tension measurement method using two oscillation modes in levitated liquid metals

et al. 2021

View full text Add to dashboard Cite

show abstract

“…It is notable that the maximum Δr in space is only 2.6×10 À 2 mm for the same droplet size, which is much less than 0.27 mm on the ground. [51] The temperature distributions and flow patterns of the alloy droplet under The average microgravity level (monitored by a gravity measurement instrument installed on the space station) in the x-direction is 2.395×10 À 5 g 0 , in the y-direction is À 4.588×10 À 6 g 0 , in the zdirection is 4.423×10 À 6 g 0 , and the overall average microgravity level is 2.603×10 À 5 g 0 throughout the entire experimental process. (b) Temperaturetime curve (measured by an infrared thermometer) with the maximum undercooling 437 K under microgravity.…”

Section: Resultsmentioning

confidence: 99%

“…However, the projection of liquid Nb 82.7 Si 17.3 alloy is close to a circle (Figure S2b). It is notable that the maximum Δ r in space is only 2.6×10 −2 mm for the same droplet size, which is much less than 0.27 mm on the ground [51] . The temperature distributions and flow patterns of the alloy droplet under microgravity condition were calculated by using the Finite Element Method (Supporting Information, Equation 7–12).…”

Section: Resultsmentioning

confidence: 99%

Metastable Liquid Properties and Surface Flow Patterns of Ultrahigh Temperature Alloys Explored in Outer Space

Wang,

Hu,

Xie

et al. 2024

Angewandte Chemie

View full text Add to dashboard Cite

The metastable liquid properties and chemical bonds beyond 2000 K remain a huge challenge for ground‐based research on liquid materials chemistry. We show the strong undercooling capability, metastable liquid properties and surface wave patterns of refractory Nb‐Si and Zr‐V binary alloys explored in space environment. The floating droplet of Nb82.7Si17.3 eutectic alloy superheated up to 2388 K exhibited an extreme undercooling of 437 K, approaching the 0.2TE threshold for homogenous nucleation of liquid‐solid reaction. The microgravity state endowed alloy droplets with nearly perfect sphericity and thus ensured the high accuracy to determine metastable undercooled liquid properties. A special kind of swirling flow was induced for liquid alloy owing to Marangoni convection, which resulted in the spiral microstructures on Zr64V36 alloy surface during liquid‐solid phase transition. The coupled impacts of surface nucleation and surface flow brought in a novel olivary shape for these binary alloys. Furthermore, the chemical bonds and atomic structures of high temperature liquids were revealed to understand the liquid properties in outer space circumstances.

show abstract

“…Although the oscillation of a charged drop was widely investigated using theoretical model [19][20][21][22][23][24][25][26][27][28] and numerical simulations [29][30][31][32][33][34] , the underlying physical mechanism behind the differences has not been well understood recently. In this paper, a finite element model is proposed to study the forced oscillations process of an initial sphere drop under the harmonic electric field excitation.…”

Section: Introductionmentioning

confidence: 99%

Resonance conditions of electrostatically levitated drops in microgravity

Zhang,

Zhong

et al. 2024

Preprint

View full text Add to dashboard Cite

The oscillation of electrostatically levitated droplets is a crucial technique for measuring thermophysical properties at high temperatures. However, notable disparities in resonance conditions have been observed between microgravity and ground experiments. In this study, a finite element method has been developed to investigate the oscillation process of charged droplets excited by an electric field in microgravity. The fluid dynamics is solved coupling with the electric field by using ALE method. It reveals that resonance conditions of electrostatically levitated drops strongly depend on the net surface charge of the droplet. When a drop possesses a substantial amount of net surface charge, it resonates as the excitation frequency approaches droplet’s natural frequency f2. Conversely, for drops with a small amount of net surface charge, the mode-2 oscillation can be excited only when the excitation frequency is half of the mode-2 resonance frequency f2/2. The simulation results demonstrate excellent agreement with experimental observations in microgravity. Understanding resonance dependence on net surface charge not only provides valuable information for improving accuracy in measuring thermophysical properties of electrostatically levitated drops, but also contribute significantly to understanding nonlinear oscillations behavior of charged drops in electrohydrodynamics.

show abstract

Experimental modulation and theoretical simulation of zonal oscillation for electrostatically levitated metallic droplets at high temperatures

Cited by 17 publications

References 35 publications

Benchmarking surface tension measurement method using two oscillation modes in levitated liquid metals

Benchmarking surface tension measurement method using two oscillation modes in levitated liquid metals

Metastable Liquid Properties and Surface Flow Patterns of Ultrahigh Temperature Alloys Explored in Outer Space

Resonance conditions of electrostatically levitated drops in microgravity

Contact Info

Product

Resources

About