Jet direction in bubble collapse within rectangular and triangular channels

Lebo Molefe and Ivo R. Peters
Phys. Rev. E 100, 063105 – Published 13 December 2019

Abstract

A vapor bubble collapsing near a solid boundary in a liquid produces a liquid jet that points toward the boundary. The direction of this jet has been studied for boundaries such as flat planes and parallel walls enclosing a channel. Extending these investigations to enclosed polygonal boundaries, we experimentally measure jet direction for collapsing bubbles inside a square and an equilateral triangular channel. Following the method of Tagawa and Peters [Phys. Rev. Fluids 3, 081601 (2018)] for predicting the jet direction in corners, we model the bubble as a sink in a potential flow and demonstrate by experiment that analytical solutions accurately predict jet direction within an equilateral triangle and square. We further use the method to develop predictions for several other polygons, specifically, a rectangle, an isosceles right triangle, and a 306090 right triangle.

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  • Received 21 August 2019

DOI:https://doi.org/10.1103/PhysRevE.100.063105

©2019 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
  1. Physical Systems
Fluid Dynamics

Authors & Affiliations

Lebo Molefe1,2 and Ivo R. Peters1,*

  • 1Faculty of Engineering and Physical Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
  • 2The University of Chicago, Chicago, Illinois 60637, USA

  • *i.r.peters@soton.ac.uk

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Issue

Vol. 100, Iss. 6 — December 2019

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