Bubble-induced Turbulence: Comparison of CFD Models

Modeling of bubble-induced turbulence in dispersed gas-liquid multiphase flow is an important but still unresolved issue. A common approach to its solution is to add source terms to the single phase two-equation turbulence models. We here report a comparison of different models of this type some of which have been used previously in the literature, some of which are new. Special care has been given to the selection of a set of reference data allowing to qualify the validity of the different models. Conclusions towards best practice guidelines for modeling bubbly turbulence are drawn and needs for further reasearch identified.