Prediction of Axial Mixing for a Structured Packed Column Using a Two-equation Model

A theoretical model based on the recently developed $ \overline {c^2}-\varepsilon _{\rm c} $ two‐equation method is proposed to predict the axial mixing behavior in a structured packed column. By solving the proposed model, the process of tracer injection experiments for determining the axial back‐mixing coefficient of structured packing can be simulated. Consequently, the axial Bodenstein number and dispersion coefficient under liquid single‐phase or gas‐liquid two‐phase flow conditions can be calculated. The validation of the proposed method is tested by simulating the two‐phase fluid flow behavior in Flexipac 2 structured packing. The simulated results are compared with the experimental data and satisfactory agreement is found between the simulation and the experiments. A theoretical model based on the recently developed $ \overline {c^2}-\varepsilon _{\rm c} $ two‐equation method is proposed to predict the axial mixing behavior in a structured packed column. The process of tracer injection experiment for determining the axial back‐mixing coefficient of structured packing can be simulated. In addition, the axial Bo number can be calculated.