Abstract
Successive deposition of uniform metal droplet is a new kind of 3D printing and rapid prototyping technology. This paper presents a systematic numerical investigation of the transient transport phenomenon during the fusion of successive droplets impinging onto a substrate surface. The physical mechanisms of the fusion process, including the bulk liquid, capillarity effects at the liquid–solid interface, heat transfer, and solidification, are identified and quantified numerically. The 3D models based on a volume of fluid method were developed to investigate the successive deposition of molten metal droplets on a horizontally aluminum substrate surface. The numerical models are validated with experiments. The comparison between numerical simulations and experimental findings shows a good agreement. The effects of relative distances between two successive molten droplets on the end-shapes of impact regime are examined. This investigation is essential to implement effective process control in metal micro-droplet deposition manufacture.
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Acknowledgments
The research is financially supported by the National Natural Science Foundation of China under Grant No. 31370944, the Natural Science Foundation of Shaanxi province (Grant 2014JQ7238), and China Postdoctoral Science Foundation (Grant 2014M560764).
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Li, S., Wei, Z., Du, J. et al. The fusion process of successive droplets impinging onto a substrate surface. Appl. Phys. A 120, 35–42 (2015). https://doi.org/10.1007/s00339-015-9146-8
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DOI: https://doi.org/10.1007/s00339-015-9146-8