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

•The impingement of two gas bubbles in a Newtonian liquid is studied numerically.•The presence of a solid spherical particle is considered.•The solid particle can be “captured” by the coalescing bubbles or “escape” them.•A parametric study is performed on the physical and geometrical conditions. In...

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Bibliographic Details
Published in:Computers & fluids 2018-07, Vol.170, p.349-356
Main Authors: Sannino, Andrea, Esposito, Alessandro, Villone, Massimiliano M., Hulsen, Martien A., D’Avino, Gaetano
Format: Article
Language:English
Subjects:
Bubble growth
Bubbles
Coalescing
Computation
Computer simulation
Direct numerical simulations
Finite element method
Foam
Gases
Impingement
Newtonian liquids
Simulation
Soft matter
Solid particle
Solids
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Summary:•The impingement of two gas bubbles in a Newtonian liquid is studied numerically.•The presence of a solid spherical particle is considered.•The solid particle can be “captured” by the coalescing bubbles or “escape” them.•A parametric study is performed on the physical and geometrical conditions. 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.
ISSN:0045-7930
1879-0747
DOI:10.1016/j.compfluid.2018.05.009