Abstract
Dynamic behaviors of a dense granular jet impacting on a circular target are numerically studied by Discrete Element Method (DEM), and the simulation results are compared with experimental data in our previous paper. Firstly, effects of solid fractions of granular jet (xp) and ratios of jet diameter to particle diameter (D/d) on the flow pattern of granular jet impact are investigated. Results show that increasing xp and D/d both increase the interparticle collision frequencies, which decrease the interparticle collision forces and relative velocities, and give rise to the liquid-like granular film, consequently. Secondly, liquid-like wave structures on the granular film are simulated by a granular jet impact with pulsation. Results indicate that the granular wave is primarily determined by the pulsation amplitude and Strouhal number (St) of granular jets. The granular jet impact with pulsation displays distinct wave structures as the optimal St is in the range of 0.2–0.8
Published Version
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