On the Dispersion of Solid Particles in a Liquid Agitated by a Bubble Swarm

Author: Bonometti Thomas   Magnaudet Jacques   Gardin Pascal  

Publisher: Springer Publishing Company

ISSN: 1543-1916

Source: Metallurgical and Materials Transactions B, Vol.38, Iss.5, 2007-10, pp. : 739-750

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Abstract

This article deals with the dispersion of solid particles in a liquid agitated by a homogeneous swarm of bubbles. The scale of interest lies between the plant scale (of the order of the tank) and the microscale (less than the bubble diameter). The strategy consists in simulating both the two-phase flow of deforming bubbles and the motion of solid particles. The evolution of the spatial distribution of particles together with the encounter and entrainment phenomena is studied as a function of the void fraction and the relative size and mass of particles. The influence of the shape of the bubble and of the model of forces that govern the motion of particles is also considered.