Dust Deposition in Granular Bed Filters: Theories and Experiments

Abstract

The paper reviews the status of granular bed dust filtration theory and its experimental verification. First, works on fluid flow around a single sphere and their relevance to filtration theory are reviewed and solutions of flows in packed and fludized beds of granules are presented. Solutions for creeping flows, potential flows, intermediate and high Reynolds number flows are discussed in relation to filtration theory. Then the various dust deposition mechanisms and their development are presented. Theories based on inertia, diffusion, and other mechanisms are reviewed. Some of the latest theories combining the different effects are described. Experimental data from the literature are presented and compared with various theoretical models.