Author(s): R. D. Rowe; J. Y. C. Poon; C. J. Laureshen
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Keywords: No Keywords
Abstract: The behaviour of round bubble plumes generated by a continuous release of gas streaming into an unstratified liquid body has been investigated. A two-phase flow model has been developed for calculating the induced turbulent vertical liquid velocity and the width of the moving stream. Based on this model, an analysis has been made of all the published round bubble plume experimental data to determine the functional relationships between the global plume properties and all of the basic parameters (entrainment coefficient α, momentum amplification factor γ and dispersion ratio λ) that are needed to characterize the turbulent flow in the region in which the flow is fully established. Dimensional arguments have been used to show that these basic param eters seem to depend solely on a new dimensionless number called the bubble Reynolds number. The simple relationships obtained can be applied in conjunction with the developed numerical model to provide a convenient prediction for the mean flow properties in any round bubble plume.
Year: 1989