| dc.description.abstract | The purpose of this study is to experimentally investigate dynamic behavior of non-spherical particles in a qusi-2D rotating drum. The effect of particle shape on flow behavior of granular assembly were explored. The dependence of transport properties on rotating speed and filling degree was also evaluated. The granular materials used in the experiment included capsule particles (aspect ratio = 2.0), ellipsoidal particlesⅠ(aspect ratio = 1.5), ellipsoidal particlesⅡ(aspect ratio = 2.0), paired particles (aspect ratio = 2.0) and spherical particles. Improved Particle Tracking Velocimetry was employed to measure translational and rotational velocities of non-spherical particles. The transport properties, such as the local average velocities, the stream-wise velocity profiles, the distributions of fluctuation velocity, diffusive displacement, granular temperature and average kinetic energy were analyzed and discussed in the thesis. The results show that the particle shape does not influence the behavior of granular assembly in the passive layer, and that spherical particles exhibit the obvious waver motion under all loading conditions. When the loading condition is 4rpm-50%, the fluctuation velocities in the flow direction show asymmetric distributions for five kinds of particles. The distributions of fluctuation velocity perpendicular to the flow direction are close between them. The distributions of rotational fluctuation velocity show symmetric patterns and salient difference resulting from particle shapes. As the rotating speed decreases, the intermittent avalanche becomes more obvious, and the fluctuation velocity distribution exhibits the same trend except 1 rpm. Filling degree has slight effect on transport properties。In addition, the avalanche of ellipsoidal particlesⅡ shows waver motion. | en_US |