Abstract

Gravity-driven granular flows down bumpy inclined surfaces were investigated. The flows consist of a bottom region of an amorphous solid-like granular material interacting with a top region of rapidly agitated grains. Chou theoretically analysed these granular flows by employing the constitutive theory, the corresponding boundary conditions and the continuity conditions at the interface. By making use of Chou's model, the research work reported here investigated the effects of the inclination, coefficient of restitution and boundary geometry on the profiles of solid concentration, mean velocity and granular temperature. The direction of the energy flux at the bumpy surfaces, as well as the flow depth for both the active and passive layers were also observed.

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