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Microbubble collapse near a fiber: Broken symmetry conditions and a planar jet formation

Physics of Fluids, ISSN: 1089-7666, Vol: 35, Issue: 2
2023
  • 15
    Citations
  • 0
    Usage
  • 10
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    15
    • Citation Indexes
      15
  • Captures
    10
  • Mentions
    1
    • News Mentions
      1
      • 1

Most Recent News

New Fluids Physics Study Findings Have Been Reported from University of Ljubljana (Microbubble collapse near a fiber: Broken symmetry conditions and a planar jet formation)

2023 FEB 27 (NewsRx) -- By a News Reporter-Staff News Editor at Physics Daily News -- Fresh data on fluids physics are presented in a

Article Description

The collapse of microbubbles near a fiber is an example often encountered in water treatment situations and cavitation fibrillation processes. However, due to the broken symmetry conditions, this process has not been studied in detail experimentally or numerically, making it difficult to precisely measure or simulate the rapid bubble evolution during collapse. In this work, we present a novel experimental method, allowing for precisely repeatable cavitation events observation, combined with numerical simulations offering insight into pressure and velocity fields distribution developments in time. Both experimental and numerical works focused on small distances between the bubble and the fiber, where the physical interaction between subjects is the strongest. Four different bubble offsets were considered within the scope of this work, and very good agreement of numerical simulations with experiments was found in all cases. Two modes of bubble collapse were identified, leading to mushroom-shaped bubbles at positions closest to the fiber and a pear-shaped bubble at the farthest position. It is noteworthy that in all four cases, a planar jet formation toward the fiber was observed. The formed jet initially assumes an elongated shape, whereas its stability depends on the mode of bubble collapse. Numerical analysis of the planar jet as the defining feature of the collapse defined lower bounds for the actual values of peak jet velocities, ranging between 250 and 330 m/s, and the resulting impact pressures, which range from 100to 500 MPa.

Bibliographic Details

Jaka Mur; Vid Agrez; Jure Zevnik; Rok Petkovšek; Matevz Dular

AIP Publishing

Engineering; Physics and Astronomy; Chemical Engineering

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