GRANULAR SPECIES SEGREGATION IN TILTED COMPARTMENTALIZED CONTAINER

Abstract

The two-dimensional, soft-sphere molecular dynamics simulations have been performed to study the granular segregation behaviors in a binary granular mixture in tilted compartmentalized container under vertical vibration. It is found that there exist mixed state, left segregated state and right segregated state, which depend on the grain properties such as size ratio and density ratio as well as shaking properties. The particles with large density favor moving to right and the particles with large diameter prefer moving to left, so binary granular mixtures with large density ratio prefer forming right segregation state and the binary mixtures with large diameter favor forming left segregation state. The tilted compartmentalized container can be regarded as a container with a sawtooth base, which leads to stratified flows and thus forming horizontal segregation state under vertical vibration. The tilted bed plays a key role in forming segregation states, whereas the central wall enhances the segregation behaviors.