Abstract
The effect of particle size on a particle layer moving along the inside wall was studied as a simultaneous phenomenon of particle deposition and reentrainment in a turbulent aerosol flow. The fine powder was dispersed in an air flow and fed into a glass tube, and the following features were found through observation using a video-microscope and image analysis.
The movement of a striped pattern particle deposition layer is proportional to the particle flux moving toward the inside wall. Furthermore, the velocity of a moving particle layer is correlated with particle size. Finally, the size of the reentrained aggregate caused by the collision of one particle can be estimated by the particle layer transfer velocity and the particle deposition flux. The size of the reentrained aggregate decreases as air velocity increases.
