Study of the motion and deposition of micro particles in a vertical tube containing uniform gas flow

In this study, effects of a gaseous jet, formed in a vertical tube containing a uniform gas flow, on the injected micro particles have been investigated. A CFD model has been developed to simulate the particle motion in the tube. This simulation is very close to the experimental data. The results show that, increasing the flow rate of carrier gas or decreasing the flow rate of surrounding gas increases the effect of gaseous jet and also increases trapping rate of the particles by the tube wall. The minimum and maximum residence times of particles approach together with increasing the size of solid particles. Particles larger than 60 mu m have a certain and fixed residence time at different flow rates of the carrier or surrounding gas. About 40 mu m particle size has minimal trapping by the tube wall at various experimental conditions.