Research on the solidified morphologies of successive pileup metal droplets

Chen, Congping; Huang, Jieguang; Yi, Hao; Zhang, Yi

doi:10.1007/s12206-020-0711-5

Cited by 10 publications

(2 citation statements)

References 32 publications

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“…Based on this, Chen et al developed a model of droplet solidification angle versus column radius to characterize the shape profile of metal columns. [ 78 ] Furthermore, Liu et al found that the input heat was not effectively diffused during rapid droplet deposition, thus causing the column to be thicker at the top and thinner at the bottom or even collapse. They proposed a method for depositing droplets with variable frequency based on the heat balance theory, effectively eliminating the heat accumulation effect during column deposition (Figure 12c).…”

Section: Fundamentals Of Metal Droplet Depositionmentioning

confidence: 99%

Metal Droplet Deposition: From Foundation to Engineering Manufacturing

Wang

Cao

et al. 2022

Adv Eng Mater

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Figure 5. a) Gas entrapment phenomenon of n-heptane droplets hitting the surface of stainless steel substrate. Reproduced with permission. [34] Copyright 1991, Royal Society. b) Simulation of gas entrapment by water droplets hitting a stainless steel substrate. Reproduced with permission. [10] Copyright 2003, AIP Publishing. c) Ultrafast X-ray phase-contrast imaging tracks the evolution of water droplet-trapping gas film. Reproduced with permission. [11] Copyright 2012, American Physical Society. d) Aluminum droplet gas entrapment phenomenon. Reproduced with permission. [12] Copyright 2016, Elsevier. e) Simulation of molten metal droplet gas entrapment evolution. Reproduced with permission.

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Section: Fundamentals Of Metal Droplet Depositionmentioning

confidence: 99%

Metal Droplet Deposition: From Foundation to Engineering Manufacturing

Wang

Cao

et al. 2022

Adv Eng Mater

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“…In the wind power plant, the ice accretion on the wind turbine blade will drastically increase loads and reduce the system performance [3]. On the other hand, the solidification of liquid droplets is also dominant in many additive manufacturing processes, such as the metal alloy droplet deposition [4], micro-droplet 3D printing [5], and laser welding [6]. The solidification dynamics and morphology would lead to different microstructures and divergence of material characteristics.…”

Section: Introductionmentioning

confidence: 99%

How does gravity influence freezing dynamics of drops on a solid surface

Zeng¹,

Lyu²,

Legendre³

et al. 2022

Preprint

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Water droplet freezing is a common phenomenon in our daily life. In both natural scenarios and industrial production, different surface inclinations bring distinctive deformation and freezing dynamics to frozen droplets. We explore the freezing of pendent and sessile droplets at different Bond number regimes. The effect of gravity on the droplet freezing process is analyzed by considering droplet morphology, freezing front dynamics, and freezing time. It is found that gravity can significantly influence droplet freezing processes via shaping the initial droplet, resulting in the flattening or elongation of pendent and sessile droplets, respectively. We show that the droplet initial geometry is the most important parameter and it completely controls the droplet freezing. Despite the significant difference in the initial droplet shape several remarkable similarities have been found for pendent and sessile droplets at small and large Bond numbers. The final height of a frozen droplet is found to be linearly proportional to its initial height. The time evolution of the ice-liquid-air contact line is found to reproduce the power-law t 0.5 , but noticeably faster than the Stefan 1-D icing front propagation. As a consequence, the time to freeze a droplet is faster than predicted by the Stefan model and it is found to be dependent on the initial droplet height and base radius through a simple power-law.

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