Research Grant Report
Effects of Adhesive Force Distribution by Admixing Smaller Particles on Improving Particle Flowability
2020 Volume 28 Pages 109-117
Details
2020 Volume 28 Pages 109-117
The particle flowability can be improved by admixing particles smaller than the original particles (main particles). However, the details of this improving mechanism are not yet fully understood. In this study, we focused on effects of adhesive force distribution at each of contact points based on admixing particle coating on improving the flowability, and investigated it using discrete element method (DEM) simulation. In this simulation, we used three different surface adhesive force distribution models (non-uniform, random, and uniform models) and calculated discharge flow rates. As a result, non-uniform models had a larger discharge flow rate compared with the other models. This is because non-uniform models had a larger frequency of generating discontinuous layer, which would suppress a formation of particle arching in a bed. Thus, in a smaller particle admixing system, adhesive force distribution at each of contact points would contribute to improving the flowability.
