CFD simulation of mass transfer in bubble columns: Detailed study of mass transfer models

Abstract

The accuracy of the computational fluid dynamics simulations of mass transfer process in bubble columns is significantly influenced by the mass transfer models. Various mass transfer models have been developed based on different theories. However, it is still confusing on the choice of mass transfer models when performing the simulations of mass transfer in bubble columns. In the present work, the applicability and accuracy of three types of widely-used mass transfer models, including the single bubble-based models, the slip velocity model, and the surface renewal stretch model, were assessed with the spatially resolved data of gas holdup and species concentration in the literature. By comparing simulation results with experimental data, the present work provided suggestions on choosing a proper mass transfer model when performing simulations of the mass transfer process in bubble columns. The influence of bubble-induced turbulence and its different modeling approaches on different mass transfer models were investigated.