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Rupture of a Subsiding Splash: A Dynamic Wake of the Freely Falling Drop Merger with a Target Fluid at Rest

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Abstract

The shape evolution of a subsiding splash of a freely falling drop (the diameter is D = 0.42 cm, and the contact velocity is U = 3.1 m/s) in the mode of active generation of sound packets was traced by high-speed video recording. The shape of the splash is continuously transformed as it spreads. During the formation of the second cavity, the splash base pinches off the depression bottom of the deformed surface of the target fluid. A third cavity is formed when the top of the splash is immersed. A returning droplet, which has previously flown out from the top of the splash and which by its lateral surface is in contact with the walls of the remnant of the third cavity, forms the fourth cavity. The shape of the last cavity is distorted by thin flows that are accelerated by the fast conversion of the available potential surface energy (APSE) when the free surfaces of the merging fluids are eliminated. A rupture in the base of the subsiding splash was observed in all experiments of this series.

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ACKNOWLEDGMENTS

The experiments were performed using the TBP Bench of URF “HPC IPMech RAS,” Ishlinsky Institute for Problems in Mechanics, Russian Academy of Sciences.

Funding

This work was supported within a State Assignment, state registration no. AAAA-A20-120011690131-7.

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Authors and Affiliations

  1. Ishlinsky Institute for Problems in Mechanics, Russian Academy of Sciences, 119526, Moscow, Russia

    Yu. D. Chashechkin & A. Yu. Il’inykh

Authors
  1. Yu. D. Chashechkin
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  2. A. Yu. Il’inykh
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Correspondence to Yu. D. Chashechkin or A. Yu. Il’inykh.

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Translated by A. Ivanov

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Chashechkin, Y.D., Il’inykh, A.Y. Rupture of a Subsiding Splash: A Dynamic Wake of the Freely Falling Drop Merger with a Target Fluid at Rest. Dokl. Phys. 67, 201–208 (2022). https://doi.org/10.1134/S1028335822060039

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