| Because of the advantages of large production capacity, high separation efficiency and operating flexibility, low pressure drop and liquid holdup, structured packings are widely applied in industrial production. Studies on the gas-liquid two-phase flow distribution and interfacial mass transfer of distillation and absorption process have become the hotspot in industry. This paper focuses on the influences of the countercurrent gas load on the hydrodynamics of liquid film flow over structured packing surface. A CFD model based on Navier-Stokes equations and VOF method is developed with software package FLUENT, and the turbulent structure is modeled with RNG k-ε model. Simulations are conducted to study the variations of liquid film hydrodynamics with countercurrent gas load (F factor), and even under the conditions of different liquid flow rate and liquid properties. Analysis mainly focuses on the transient motions of liquid film, gas-liquid two-phase flow structure, velocity field distribution along interface, and corresponding liquid holdup and effective interfacial area. |
PDF Full Text Request