Abstract
Morphology of 5-micron fly ash particles accumulated on granules (5-mm glass beads) was observed and photographed by a digital microscope, and the reentrainment of dust particles was qualitatively discussed in the present paper. When the filtration velocity was low, the collision of dust particles was a main cause of reentrainment. As the filtration velocity increases, the drag force and the change in the shape of deposited particles on the granules are the major causes.
