On the Relative Movement and Diffusive Behaviour of Particles with Size Distribution, Under Steady Homogeneous Flow

As applied to axial dispersion of liquid droplets in continuous column extractors

Abstract

A mean particle size effective to the swarm of particles with size resented to apply the usual voidage function to the flow behaviour of them, when the particles are under steady homo-geneous flows in a continuous countercurrent extraction column. With this mean size, the observed rate of hindered settline of mixed size particles is well described by applying the slip velocity modulus. The properties of observed slip velocity modulus and particle diffusion are discussed and an approximate expression is developed for the voidage function of fluid bubbles. Finally, longitudinal dispersion of liquid droplets in continuous countercurrent extraction columns is formulated, showing moderate agreement with the observed data for R. D. C.