Time dependent behaviour of the flow in a bubble column

J. S. Groen, R. F. Mudde, H. E.A. Van Den Akker

Research output: Contribution to journalArticlepeer-review

Abstract

New experimental data on local two-phase hydrodynamic behaviour in bubble columns are presented. Glass fibre techniques and pressure fluctuation analysis were applied in a 15.2 and in a 23.4 cm bubble column, both operated at aspect ratio 4. Measurements were performed at gas superficial velocities up to 8 cm s-1. Various signal correlation, time windowing and noise analysis techniques were used in data analysis. The glass fibre measurements showed a clear time-dependent behaviour of the flow. The pressure fluctuation measurements support this view. The presence of one large-scale overall liquid circulation rather than of distinct circulation cells in the column was observed. The influence of the distributor plate on the flow in the column is discussed. These observations lead to a concept which treats a bubble column as a non-steady system.

Original languageEnglish
Pages (from-to)615-621
Number of pages7
JournalChemical Engineering Research and Design
Volume73
Issue numberA6
Publication statusPublished - Aug 1995
Externally publishedYes

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