MODELING OF SAUTER-MEAN-DIAMETER AND HOLD -UP FOR A CONICAL TURBINE IN A GAS-LIQUID DISPERSION

By comparing the experimental data of the Sauter-mean-diameter d(32) a nd the hold up cp with models from literature, there are presented equ ations for d,, and phi for the used conical turbine in gas-liquid syst ems. The necessary adjustment of the proportionality constants of the literature equations will be explained on the basis of fluiddynamical phenomena. It can be established by fluiddynamical results of a former study carried out with laser-doppler-anemometry. Coalescence phenomen a are taken into account in the model using an analogy to bubble colum ns. The analogy to bubble columns turns out to be suitable. Arguments for the necessity of considering the local fluiddynamics in the modell ing of dispersions are presented.