189 citations · 935 across the 41 of their papers we have counts for
29 papers · 1 filter
Mechanisms leading to axial segregation of bidisperse particles in rotating tumblers
Umberto d'Ortona, Richard Lueptow, Nathalie Thomas
The origin of segregated axial bands for size-bidisperse particles in long rotating tumblers is a long-standing question in granular flows and a problem of both fundamental and pra…
Percolation of a rod-like particle in a static bed of spheres: trapping and passing
Juan C. Petit, Julio M. Ottino, Richard M. Lueptow +1
We numerically investigate percolation of independent frictionless glued-sphere rod-like particles under gravity through a disordered static bed of larger spheres. We identify two…
Percolation of a cohesive fine particle in a static bed
Jizhi Zhang, Qiong Zhang, Julio M. Ottino +2
Percolation of fine particles (fines) in a static bed of larger particles is central to many industrial and natural processes. Non-cohesive fines either pass through the bed or bec…
Fine Particle Percolation Dynamics in Porous Media
Dhairya R. Vyas, Richard M. Lueptow, Julio M. Ottino +1
The influences of restitution coefficient, , inter-particle friction, , and size ratio, , on gravity-driven percolation of fine particles through static beds of larger p…
Membrane Charge Effects on Solute Transport in Polyamide Membranes
Suwei Liu, Zi Hao Foo, John H. Lienhard +2
Polyamide membranes, such as nanofiltration (NF) and reverse osmosis (RO) membranes, are widely used for water desalination and purification. However, the mechanisms of solute tran…
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…