Abstract
The behavior of adhesive fine powder on a vibrating wall was analyzed using the distinct element method. The moving elements were spherical particles 10μm in diameter, and the adhesive force was taken into account as an interaction force between the contact bodies. When vibration of 20kHz started, the particles piled on the wall were immediately broken down in the gravitational field and changed into small agglomerates which were moving randomly. The state of small agglomerates was controlled by vibrational dispersion and agglomeration, which could be evaluated by a particle contact number. The number increased with decreasing vibrational acceleration and/or increasing adhesive force. Furthermore, two conflicting phenomena related to the vibrating powder, i. e., high flowablility and close packing, were explained by the strength of the adhesive force.
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