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Détail de l'auteur
Auteur Arup K. Das
Documents disponibles écrits par cet auteur
Affiner la rechercheBubble evolution through a submerged orifice using smoothed particle hydrodynamics / Arup K. Das in Industrial & engineering chemistry research, Vol. 48 N° 18 (Septembre 2009)
[article]
in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8726–8735
Titre : Bubble evolution through a submerged orifice using smoothed particle hydrodynamics : effect of different thermophysical properties Type de document : texte imprimé Auteurs : Arup K. Das, Auteur ; Prasanta K. Das, Auteur Année de publication : 2010 Article en page(s) : pp. 8726–8735 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Gas bubbles Submerged orifice Liquid pool Industrial applications Résumé : Formation of gas bubbles through an orifice under a liquid pool is important as a topic of fundamental research and is relevant in diverse industrial applications. This complex process is influenced by a large number of process parameters including the properties of the liquid and the gas phase. In the present work investigations have been made for bubble evolution at a submerged orifice using a computational simulation. Smoothed particle hydrodynamics is used to model the formation and detachment of the bubble from the orifice mouth. Using the advantage of this particle-based method, effects of density, viscosity, and surface tension of the liquid are investigated by noticing instantaneous bubble contour and the duration of bubble growth. The present simulation has been validated satisfactorily against published results. Finally, the process of neck formation and bubble pinch off has also been studied by varying the specific fluid properties individually. It has been noticed that the effect of surface tension and the effect of viscosity on bubble growth and necking are just the reverse of the effect of density on these processes. Moreover, compared to surface tension and density, the effect of viscosity on bubble evolution is marginal. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900350h#cor1 [article] Bubble evolution through a submerged orifice using smoothed particle hydrodynamics : effect of different thermophysical properties [texte imprimé] / Arup K. Das, Auteur ; Prasanta K. Das, Auteur . - 2010 . - pp. 8726–8735.
Chemical engineering
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8726–8735
Mots-clés : Gas bubbles Submerged orifice Liquid pool Industrial applications Résumé : Formation of gas bubbles through an orifice under a liquid pool is important as a topic of fundamental research and is relevant in diverse industrial applications. This complex process is influenced by a large number of process parameters including the properties of the liquid and the gas phase. In the present work investigations have been made for bubble evolution at a submerged orifice using a computational simulation. Smoothed particle hydrodynamics is used to model the formation and detachment of the bubble from the orifice mouth. Using the advantage of this particle-based method, effects of density, viscosity, and surface tension of the liquid are investigated by noticing instantaneous bubble contour and the duration of bubble growth. The present simulation has been validated satisfactorily against published results. Finally, the process of neck formation and bubble pinch off has also been studied by varying the specific fluid properties individually. It has been noticed that the effect of surface tension and the effect of viscosity on bubble growth and necking are just the reverse of the effect of density on these processes. Moreover, compared to surface tension and density, the effect of viscosity on bubble evolution is marginal. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900350h#cor1 Numerical study of dynamics of bubbles using lattice boltzmann method / Sumana Ghosh in Industrial & engineering chemistry research, Vol. 51 N° 18 (Mai 2012)
[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