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Bubble Sizes and Shapes in a Counter-current Bubble Column with Pure and Binary Liquid Phases by Besagni, Giorgio; Inzoli, Fabio is a Engineering article available to read on EtoBox.

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It is generally admitted that the "global-scale" behavior of bubble columns is imposed by the "local-scale" phenomena. For this reason, understanding the fluid dynamics in bubble columns relies on the precise knowledge of the so-called "birth and life" of bubbles. A-priori knowledge of the bubble sizes and shapes is required to characterize the "local-scale", to understand the "global-scale", to set-up and validate numerical models, as well as to support scaling-up methods towards the "industrial-scale". This paper contributes to the present-day discussion by proposing an experimental research devoted to clarify the relationships between the bubble sizes and shapes, the integral flow parameters, and the liquid phase properties. The experimental study, based on a bubble-identification methods, was performed in a "large-scale" bubble column (inner diameter equal to 0.24 m, height equal to 5.3 m) operated in the batch and in the counter-current modes with pure (deionized water) and binary (mixture of ethanol and deionized water) liquid phases. The system was operated in the pseudo-homogeneous flow regime with superficial gas velocities in the range of 0.0037-0.0188 m/s and superficial

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Author

Besagni, Giorgio; Inzoli, Fabio

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0955-5986)

Published

2019

Language

EN

Field

Engineering (Physical Sciences)