摘要：This paper aims to investigate the behavior and interaction of wet granular avalanches when hit an obstacle on the inclined plate. The cohesive contact model of discrete element method (DEM)is used to simulate the wet granular flow regimes after the avalanche occurred. The impact of surface energy and grain compositions to kinematic characters, de-posit pattern and force on the obstacle of wet gra-nular avalanches are discussed. The results show that after the wet granular avalanches hitting the baffle on the slope, the grain deposit forms symmetrical ac-cumulated zones on the horizontal plate. With the in-crease of surface energy, the dispersed degree of wet granular flows becomes smaller, the longitudinal sli-ding distance is also shorter. Furthermore, the grain size and deposit compositions of initial source have little influence on final accumulated ranges and sli-ding average velocity of the wet granular avalanches when the surface energy is the same. Moreover, with the increase of surface energy, the cohesion between particles becomes stronger, lead to greater collision force to obstacle by the wet granular avalanches. These results highlight the capability of cohesion model in DEM for simulating avalanches of wet gra-nular material with proper parameters. Some im-portant conclusions about the cohesive contact mo-del are obtained, which can be used to optimize de-fense structures in mountain regions.
关键词：Wet granular environment;discrete element method;obstacle;contact model;grain compositions
