Author(s)

J. Yang & R. J. Chalaturnyk

Abstract

Segregation in a dense solid-liquid multiphase flow is complicated by its interactions between phases. In this paper, the segregation of dense solid-liquid flow was simulated using the Finite Volume Method. A Euler-Euler multiphase simulation was conducted for the dense solid-liquid flow. The flow in the viscous regime was evaluated using kinetic theory describing the flow of smooth, slightly inelastic, spherical particles. The friction between solid particles which occurs in the plastic regime was evaluated based on the concepts from critical soil mechanics. The challenge of simulating non-segregation behaviour of dense solid-liquid flow was discussed. Keywords: multiphase flow, segregation, dense solid-liquid flow, finite volume method, computational fluid dynamics (CFD), Euler-Euler multiphase simulation. 1 Introduction Particle segregation was observed to occur in particles with different size or density under shearing. Depending on the particle properties and shearing conditions, segregation in radial, axial or vertical direction may take place. Since segregation is beneficial to some applications (e.g. sorting of particles with different densities) while it is unfavourable in other fields (e.g. sedimentation of tailing slurry), segregation mechanisms and it’s modelling have been studied by researchers in different areas. Segregation in rapid granular flow has been investigated thoroughly [1,2]. Competition between buoyancy force and geometric force [3], percolation and

Keywords

multiphase flow, segregation, dense solid-liquid flow, finite volume method, computational fluid dynamics (CFD), Euler-Euler multiphase simulation.