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A study of velocity and residence time of single bubbles in a gassed oscillatory baffled column: effect of oscillation amplitude
Author(s) -
Oliveira Mónica S N,
Fitch Andrew W,
Ni XiongWei
Publication year - 2003
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.755
Subject(s) - amplitude , oscillation (cell signaling) , bubble , mechanics , residence time (fluid dynamics) , work (physics) , chemistry , physics , thermodynamics , optics , geology , geotechnical engineering , biochemistry
Abstract In this paper, the experimental evaluation of velocity and residence time of single bubbles of different sizes in a gassed oscillatory baffled column (OBC) using a high‐speed imaging technique is reported. This work is particularly concentrated on the effect of oscillatory amplitude. The results show that the instantaneous axial bubble velocities vary up to four times with respect to the mean value at an oscillatory amplitude greater than 2 mm. The ratio of the radial to axial bubble velocity increases beyond unity for the highest oscillation amplitude investigated. The direct measurement of residence time of the bubbles within a baffled cell is also reported. © 2003 Society of Chemical Industry