76th Annual Meeting of the APS Division of Fluid Dynamics (November 19, 2023 — November 21, 2023)

P0016: “FROZEN IN TIME” SPLASH OF OXIDIZED LIQUID METAL DROPLETS

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Authors

• Peiwen Yan, Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, CA 90095, USA
• Ryan McGuan, Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, CA 90095, USA
• Pirouz Kavehpour, Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, CA 90095, USA

DOI: https://doi.org/10.1103/APS.DFD.2023.GFM.P0016

The splash of an impact droplet has been a focus of numerous research on rather late-time fingering instability since the Renaissance. In particular, for impacting liquid metal droplets, the oxide film “freezes in time” the early undulation at ephemeral time scale (~100 ns), considered impossible to unveil even via contemporarily attainable ultra-high-speed imaging. The magnified visualization of the mechanism offers insights into revelation of multi-scale patterns with fundamental fluid instabilities and significance of practical additive manufacturing, i.e., liquid metal printing of microelectronics.