| Bubble column are widely used as gas-liquid contactors. They have applications in chemical, petrochemical and biological industries. Knowledge about hydrodynamics of bubble column is necessary for design purposes. Although a lot of information is found in the literature, bubble columns hydrodynamics are still not however well understood and the work is often oriented on only one phase i.e. liquid or gas. Because the hydrodynamics of each phase are intimately linked, the study of their interaction is of interest. Measurement about local hydrodynamics is helpful for this kind of study. The objectives of this work is to study the local hydrodynamics of the liquid phase and its interaction with the gas phase hydrodynamics.;The interactions of the phases generates flow characteristics, which possibly change with position in the bubble column, superficial gas velocity and flow regimes. In order to study that, a local thermal pulsed technique (tracer technique) is used.;Liquid mixing is investigated at the mesoscale. (Abstract shortened by UMI.). |
