189 citations · 935 across the 41 of their papers we have counts for
5 papers · 1 filter
Improved Velocity-Verlet Algorithm for the Discrete Element Method
Dhairya R. Vyas, Julio M. Ottino, Richard M. Lueptow +1
The Discrete Element Method is widely employed for simulating granular flows, but conventional integration techniques may produce unphysical results for simulations with static fri…
Origin of granular axial segregation bands in a rotating tumbler: An interface-mixing driven Rayleigh-Taylor instability
Umberto d'Ortona, Richard Lueptow, Nathalie Thomas
The origin of large and small particle axial bands in long rotating tumblers is a long-standing question. Using DEM simulations, we show that this axial segregation is due to a Ray…
Granular segregation across flow geometries: a closure model for the particle segregation velocity
Yifei Duan, Lu Jing, Paul B. Umbanhowar +2
Predicting particle segregation has remained challenging due to the lack of a general model for the segregation velocity that is applicable across a range of granular flow geometri…
Lift Force on a Moving Intruder in Granular Shear Flow
Hantao He, Qiong Zhang, Julio M. Ottino +2
Lift and drag forces on moving intruders in granular materials are of fundamental interest. While the drag force on an intruder in granular flow has been studied, the few studies c…
Impacts of packed bed polydispersity and deformation on fine particle transport
Dhairya R. Vyas, Song Gao, Paul B. Umbanhowar +2
Static granular packings play a central role in numerous industrial applications and natural settings. In these situations, fluid or fine particle flow through a bed of static part…