Hydrodynamics of bubble columns in the uniform bubbling regime

✍ Scribed by O. Moleurs; M. Kurtin

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 642 KB
• Volume: 40
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(85)80010-5

✦ Synopsis

A relation which defines the drag of spherical particles in more or less concentrated suspensions was employed to describe bubble column behaviour in the uniform bubbling regime. General validity of the relation under low density ratios of dispersed to continuous phase was shown by evaluation of fluidixation experiments with spherical foamed polystyrene particles. Experiments performed by the authors as well as evaluation of measurements found in literature also confirmed the suitability of the relation in question for bubble columns. In particular, mean bubble sizes can be predicted from simultaneous measurements of the superficial velocities of gas and liquid and of the gas holdup, respectively. Furthermore, limiting conditions for uniform bubbling can be read off a state diagram of the uniform bubbling regime.