Discrete particle simulations provide a powerful tool for the advancement of our
understanding of granular media, and the development and refinement of the multitudinous …

The discrete element method (DEM) is used extensively for the simulation of granular
materials and in powder technology. Averaging or coarse graining (CG) techniques, also …

In the past ten years much work has been undertaken on developing mixture theory
continuum models to describe kinetic sieving-driven size segregation. We propose an …

It is well-known that in a dense, gravity-driven flow, large particles typically rise to the top
relative to smaller equal-density particles. In dense flows, this has historically been attributed …

Size segregation, which is a robust feature of sheared granular mixtures and geophysical
mass flow deposits, is found to diminish in the presence of a viscous fluid. We study this …

Over the last 12 years, numerous new theoretical continuum models have been formulated
to predict particle segregation in the size-based bidisperse granular flows over inclined …

Debris flows are common geological hazards in mountainous regions worldwide. Predicting
the impact pressure of debris flows is of major importance for hazard mitigation. Here, we …

Micro–macro transition methods can be used to, both, calibrate and validate continuum
models from discrete data obtained via experiments or simulations. These methods …

We consider the evolution of particle segregation in collisional flows of two types of spheres
down rigid bumpy inclines in the absence of sidewalls. We restrict our analysis to dense …

Inter-species drag forces in granular flows play a central role in setting the speed and extent
of segregation, a process that separates grains of different size or density. Here, we study …