Modeling the distribution of dispersed phase in a cylindrical flow using computational fluid dynamics

The influence of the diameter of a cylindrical region filled with water on the structure of a bubble polydisperse flow is analyzed. Numerical simulation of the flow is based on a mathematical model that uses the Euler–Euler approach to the description of multiphase media, and includes the heterogeneous MUSIG model for the description of polydispersity, the $k$-$\omega$-SST turbulence model, and interfacial momentum transfer. The bubble distributions in the sections near the sparger and near the free surface are obtained. The regimes of the bubble flow with full and partial filling of the region are identified and the transition criterion is determined.