Three-dimensional CFD simulation of stratified two-fluid Taylor-Couette flow

Abstract

Two-fluid Taylor-Couette flow, with either one or both of the co-axial cylinders rotating, has potential advantages over the conventional process equipment in chemical and bio-process industries. This flow has been investigated using three-dimensional CFD simulations. The occurrence of radial stratification, the subsequent onset of centrifugal instability in each phase, the cell formation and the dependency on various parameters have been analyzed and discussed. The criteria for the stratification, Taylor cell formation in each phase have been established. It can be stated that the analysis of single-phase flow acts as the base state for the understanding of radial stratification of the two-fluid flows. The extent of interface deformation also has been discussed. A complete energy balance has been established and a very good agreement was found between dissipation rate by CFD predictions and the energy input rate through the cylinder/s rotation.