Abstract
To study the micro-mechanics of granular flows, disc flow are generated by using two-dimensional rapid flow apparatus and shear stress and particle movement are measured. To decrease the friction between disc and floor, which disturbs particle moving, polyethylene disc instead of steel sphere are selected. By using disc particles and the rapid shear apparatus, (a) effect of solid fraction on shear stress generation, (b) effect of shear strain rate on the stress generation and (c) distribution of particle velocity are studied. It can be said that the relationship between shear strain rate and shear stress measured in disc flow is qualitatively similar to the relationship measured by using steel sphere and same apparatus. In comparison between disc and sphere, it can be said that disc has an advantage in tracking particle movement by PTV software.
