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Fast, thin jets from bubbles expanding and collapsing in extreme vicinity to a solid boundary: A numerical study

Christiane Lechner, Werner Lauterborn, Max Koch, and Robert Mettin
Phys. Rev. Fluids 4, 021601(R) – Published 5 February 2019
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Abstract

A bubble expanding and collapsing in water near a flat solid boundary is studied numerically. According to current knowledge, it develops a high-speed liquid jet towards the boundary of typically 100 m/s. However, the character of jet formation and the jet properties alter strongly when the bubble expands and collapses very close to a solid boundary. In this case, a much thinner and much faster jet of typically 1000 m/s is generated. The respective mechanism is demonstrated by solving the Navier-Stokes equations for a model of a laser-induced bubble. The results add substantially to the understanding of the erosion process caused by imploding cavitation bubbles near solid boundaries.

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  • Received 3 August 2018

DOI:https://doi.org/10.1103/PhysRevFluids.4.021601

©2019 American Physical Society

Physics Subject Headings (PhySH)

Fluid Dynamics

Authors & Affiliations

Christiane Lechner1,2,*, Werner Lauterborn1, Max Koch1, and Robert Mettin1

  • 1Drittes Physikalisches Institut, Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
  • 2Institute of Fluid Mechanics and Heat Transfer, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria

  • *Corresponding author: christiane.lechner@tuwien.ac.at

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Vol. 4, Iss. 2 — February 2019

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