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Multiphase Science and Technology
SJR: 0.183 SNIP: 0.483 CiteScore™: 0.5

ISSN Imprimir: 0276-1459
ISSN On-line: 1943-6181

Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.2017019092
pages 173-191

COLLAPSE OF A TAYLOR BUBBLE AT A FREE SURFACE

Basanta Kumar Rana
Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
Arup Kumar Das
Department of Mechanical and Industrial Engineering, IIT Roorkee, Roorkee, Uttarakhand-247667, India
Prasanta Kumar Das
Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India

RESUMO

Numerical simulations were performed to investigate the bursting of a Taylor bubble at a free surface and the film drainage around the bubble for both vertical and inclined liquid columns. A wide range of tube inclinations and variations of different fluid properties, such as the viscosity, density, and surface tension, are used to establish the theory behind bubble bursting phenomenon. The volume of fluid–based finite-volume formulation is used for the mass and momentum balance of the domain and interface tracking. It was observed that film drainage around the bursting bubble increases for fluids having high Morton numbers. In case of vertical tube, phenomenon is axisymmetric, but with inclination of the tube, thickness increases in lower film than the liquid above the bubble. This gives rise to an altogether different mechanism of bubble bursting inside the inclined tube and subsequently affects the film drainage time. Finally, it was observed that in the case of an inclined tube the bubble collapse takes more time at higher Morton numbers due to the formation of a spherical cap-type envelope at the advancing front of the bubble.


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