Bubble impingement in the presence of a solid particle: a computational study

Andrea Sannino, Alessandro Esposito, Massimiliano M. Villone, Martien A. Hulsen, Gaetano D'Avino

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Abstract

In this work, we numerically investigate the dynamics of the growth and impingement of two gas bubbles in a Newtonian liquid in the presence of a rigid spherical particle. The computational analysis is carried out through 3D Arbitrary Lagrangian Eulerian (ALE) Finite Element Method (FEM) simulations. During their growth, as the bubbles start to ‘feel’ each other, they lose their spherical shape, with the side facing the other bubble becoming almost flat. In the liquid layer between the gas inclusions, an essentially biaxial extensional flow takes place. Depending on its initial position with respect to the bubbles, the solid particle can be ‘captured’ by the coalescing bubbles or ‘escape’ them. The effects of the physical and geometrical parameters of the system on such phenomenon are studied.

Original languageEnglish
Pages (from-to)349-356
Number of pages8
JournalComputers & Fluids
Volume170
DOIs
Publication statusPublished - 15 Jul 2018

Keywords

  • Bubble growth
  • Direct numerical simulations
  • Foam
  • Impingement
  • Soft matter
  • Solid particle

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