Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/14599
Title: Modeling the effect of liquid viscosity and surface tension on bubble formation
Authors: ZHANG YALI
Keywords: modeling, bubble formation, non-spherical model, liquid viscosity, surface tension, Newtonian liquid.
Issue Date: 14-Apr-2005
Citation: ZHANG YALI (2005-04-14). Modeling the effect of liquid viscosity and surface tension on bubble formation. ScholarBank@NUS Repository.
Abstract: An improved non-spherical model for bubble formation and detachment at a submerged orifice has been developed. The model is based on the interfacial element approach of Tan and Harris (1986), but is modified to include the influence of viscosity in a Newtonian liquid via a viscous drag force on each interfacial element. The gas-liquid interface is divided into a finite number of differential elements, and equations of motion are applied to each element to calculate the instantaneous coordinates constituting the bubble shape during its motion.The new model is used to predict the combined effects of viscosity and surface tension on bubble formation. Results for bubble growth rate and final bubble volume agreed very well with experimental data, except in the very low Re creeping flow regime. For a large number of simulations for practically-realistic systems, the model successfully predicted the experimental data to within A?15%.
URI: http://scholarbank.nus.edu.sg/handle/10635/14599
Appears in Collections:Master's Theses (Open)

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