CFD modelling to predict mass transfer in pulsed sieve plate extraction columns

Abstract

A 2D CFD-PBM based numerical model to predict interphase mass transfer in a Pulsed Sieve Plate Column (PSPC) is reported. The model is based on Euler-Euler interpenetrating continuum approach. Drag law due to Schiller and Naumann is used to model the interphase momentum exchange term. Spatial and temporal variations of drop population are obtained by coupling Population Balance (PB) equations with flow equations. Suitable drop coalescence and breakage kernels are used in the PB equations. Species transport equation is solved in both phases to predict interphase mass. The developed model is validated against reported mass transfer experimental data in a 2 inch PSPC. Absolute average error in prediction is less than 5%. The validated model is used to understand the complex time periodic flow patterns inside the column.