Spatially resolved experimental analysis and modeling of mass transfer from rising gas bubbles under influence of swarm turbulence with superimposed chemical reaction
In spite of its great practical importance the design of multiphase reactors is still an unsolved problem. The reason for this is the lack of measurement capabilities of mass transfer phenomena which arise from local bubble swarms with superimposed chemical reactions. Essentially, only empirical equations can be found which are derived from integrally gained measurement data.Within this approach a spatially and temporally highly resolved experimental analysis of the reactive mass transfer on shape dynamic gas bubbles is proposed. The influence of swarm turbulence and superimposed chemical reaction on the local flow field around single bubbles and its mass transfer is investigated. For this a bubble analogue particle-grid is used to generate swarm turbulences in order to conduct investigations on real single bubbles located at an optical accessible point in the proximity of the turbulence generator. For deeper hydrodynamic characterization of the particle induced turbulence, the grids will be used in other workgroups of the SPP 1740 (cooperation partner: Prof. Kähler) in order to execute a comparative validation with two-phase flows by means of stereo-PIV- and LIF measurement technology.
Institut für Umweltverfahrenstechnik
Prof. Dr. Jorg Thömung
Philip Kember, M. Sc.