A study of velocity and residence time of single bubbles in a gassed oscillatory baffled column: effect of oscillation amplitude

被引：7
|
作者：
Oliveira, MSN [1 ]
Fitch, AW [1 ]
Ni, XW [1 ]
机构：
[1] Heriot Watt Univ, Sch Engn & Phys Sci, Ctr Oscillatory Baffled Reactor Applicat, COBRA, Edinburgh EH14 4AS, Midlothian, Scotland
来源：
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY | 2003年 / 78卷 / 2-3期
关键词：
oscillatory baffled column; bubble velocity; bubble residence time; high speed imaging; oscillation amplitude;
D O I：
10.1002/jctb.755
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
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. (C) 2003 Society of Chemical Industry.
引用
收藏
页码：220 / 226
页数：7
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