Experimental evidence and theoretical modeling suggest that piles of confined, high-restitution grains, subject to low-amplitude vibration, can serve as experimentally-accessible analogs for studying a range of liquid-state molecular hydrodynamic processes. Experiments expose single-grain and multiple-grain, collective dynamic features that mimic those either observed or predicted in molecular-...

Comment on the paper J. Solsvik and E. Manger, "Kinetic theory models for granular mixtures with unequal temperature: Hydrodynamic velocity," Phys. Fluids \textbf{33}, 043321 (2021).

The continuum theory of partially fluidized shear granular flows is tested and calibrated using two-dimensional soft particle molecular dynamics simulations. The theory is based on the relaxational dynamics of the order parameter that describes the transition between static and flowing regimes of granular material. We define the order parameter as a fraction of static contacts among all contact...

Understanding the flow behavior of complex concentrated slurries is tremendous importance for industrial waste management. In this study, transport three–phase oil sands tailings in a horizontal pipeline simulated via mixture multiphase model coupled with kinetic theory granular flow. The solid particles and bitumen droplets are conveyed non–Newtonian carrier fluid turbulent regime inside an in...

This paper examines the roles that granular flow theory might play in the modeling the solid-phase stresses in fluidized beds. It begins with a discussion of the historical limiting cases of the quasistatic and rapid-flow regimes. It then reviews the elastic granular theories that unify those two regimes. Finally it shows that measurements of solid-phase pressures cannot be explained by commonl...

We study in this work a steady shearing laminar flow with null heat flux (usually called "uniform shear flow") in a gas-solid suspension at low density. The solid particles are modeled as a gas of smooth hard spheres with inelastic collisions while the influence of the surrounding interstitial fluid on the dynamics of grains is modeled by means of a volume drag force, in the context of a rheolo...