Euler-Euler modeling of reactive flows in bubble columns

In the present project, closure models for chemical reactions as well as the as-sociated mass transport are included in the Euler-Euler description of bubbly flows. This approach allows to capture inhomogeneous distributions of gas fraction as well as local differences in concentration and flow fields on the scale of the bubble column. In this way, calculations up to the size of industrial equipment or components thereof become feasible. To achieve this goal, suit-able closure models for processes occurring on the scale of individual bubbles have to be devised. The simulation results, are then compared with experi-mental data to validate the employed models.
The challenge in this endeavor based on the state-of-the-art at the beginning of the project is threefold: First, the available understanding of mass transfer from or to single bubbles both without and with the simultaneous occurrence of a chemical reaction is limited. Second, experimental data of a quality, which is suitable for the purpose of model validation, are scarce. Third, for re-active systems the intrinsic reaction kinetics and material parameters depend-ing on the concentrations of all involved species and temperature are often not known.