Mark Gilbertson

Segregation in fluidised currents of particles

Abstract: When gas is passed through mixtures of particles of different sizes then a variety of structures can form with the segregation of particles. This behaviour has important consequences for the processing of practical materials containing a wide range of sizes and understanding environmental deposits. The behaviour can be accounted for by considering the increase in mobility afforded to the mixture components as the gas flow increases and supports more of their weight, and the extent to which this happens depends on the structure of the bed. The poster will extend this work to examining the segregation of particles in fluidised currents of particle mixtures. In particular it shows that longitudinal segregation can take place in dense currents of particles. This behaviour can be explained using a similar framework as that for static beds.