Multiscale Calculation on Perforated Sheet Structured Packing To Predict the Liquid Distribution Based on Computational Fluid Dynamics Simulation

This paper is the subsequent work of our previous study in which the liquid distribution on an imperforate structured packing sheet was predicted. In this study, a novel multiscale model for describing the liquid distribution on the perforated structured packing sheet is proposed. The large scale model is a mechanistic model, using liquid split coefficients as model parameters derived from a 3D volume of fluid (VOF) simulation within the representative units. The model can theoretically adapt to vary working conditions; and the liquid distribution of all the packing layer/tower can be given. Five types of flow patterns are discussed according to the simulation results. The influence of gas flow and openings on liquid flow are also discussed. This proposed model can supply a deep insight into the mechanism of the liquid distribution inside the packing tower and help us to understand the details of interphase behavior which are hardly available by experiment.