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Numerical study of dynamics of bubbles using lattice boltzmann method / Sumana Ghosh in Industrial & engineering chemistry research, Vol. 51 N° 18 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6364-6376 Titre : Numerical study of dynamics of bubbles using lattice boltzmann method Type de document : texte imprimé Auteurs : Sumana Ghosh, Auteur ; Arup K. Das, Auteur Année de publication : 2012 Article en page(s) : pp. 6364-6376 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Dynamics  Bubbles Résumé : The dynamics of gaseous bubbles inside a tube filled with liquid has been modeled using the lattice Boltzmann method The diffused interface concept has been used to capture the shape of the complex interface separating two phases having high density ratio. Hydrodynamics of rising bubble inside the tube is studied in detail. Properties like densities of the phases, viscosity of the liquid, and surface tension are varied to evaluate their effects on the final shape as well as on the terminal velocity of the bubble. The volume of the bubble and the diameter of tube are also varied over a wide range to establish the effect of initial conditions on shape and the terminal velocity. Further attempts have been made to study the interaction of multiple bubbles consisting of arrays in horizontal and vertical forms. Shape distortion of one bubble due to the influence of other and merging of two bubbles due to their different uprising velocities are numerically modeled. Finally, numerical simulation is made to model Rayleigh Taylor instability which matches well with the literature. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201445d [article] Numerical study of dynamics of bubbles using lattice boltzmann method [texte imprimé] / Sumana Ghosh, Auteur ; Arup K. Das, Auteur . - 2012 . - pp. 6364-6376. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6364-6376 Mots-clés : Dynamics  Bubbles Résumé : The dynamics of gaseous bubbles inside a tube filled with liquid has been modeled using the lattice Boltzmann method The diffused interface concept has been used to capture the shape of the complex interface separating two phases having high density ratio. Hydrodynamics of rising bubble inside the tube is studied in detail. Properties like densities of the phases, viscosity of the liquid, and surface tension are varied to evaluate their effects on the final shape as well as on the terminal velocity of the bubble. The volume of the bubble and the diameter of tube are also varied over a wide range to establish the effect of initial conditions on shape and the terminal velocity. Further attempts have been made to study the interaction of multiple bubbles consisting of arrays in horizontal and vertical forms. Shape distortion of one bubble due to the influence of other and merging of two bubbles due to their different uprising velocities are numerically modeled. Finally, numerical simulation is made to model Rayleigh Taylor instability which matches well with the literature. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201445d