Theory and experiment have both contributed extensively to the study of compaction in granular media in recent years. The experiments of the Chicago group [18,19] have in particular inspired a large body of theorists to model the tapping of various systems. In many of these formulations, including the one we present here, an analogy is made between the volume of a granular system and the Hamilt...

The Mohr-Coulomb theory of strength identifies cohesion and internal friction as the two principal contributions to the shear strength of a granular material. The contribution of cohesion in over-compacted granular materials has been challenged and replacing cohesion with interlocking has been proposed. A theory of rupture strength that includes interlocking is derived herein. The physics-chemi...

In this study, a Eulerian-Eulerian liquid-solid two-phase flow model combined with kinetic theory of granular was established to study the hydrodynamic characteristics and fluidization behaviors coarse coal particles in 3D fluidized bed. First, grid independence analysis conducted select appropriate parameters. Then, developed computational fluid dynamics (CFD) validated by comparing experiment...

Discrete element based simulations of granular ow in a d velocity space are compared with a particle code that solves kinetic granular ow equations in two and three dimensions The binary collisions of the latter are governed by the same forces as for the discrete elements Both methods are applied to a granular shear ow of equally sized discs and spheres The two dimensional implementation of the...

This study explored the feasibility of using granular ferric hydroxide as adsorbent for the removal of NO3-N. Optimum conditions for NO3-N removal were found to be pH 5.0 and equilibrium time 80min. The equilibrium sorption isotherm was better described by Langmuir sorption isotherm model. The maximum sorption capacity of granular ferric hydroxide was 4.254mg/g at 298K. A comparison of four kin...

The solid–fluid phase transition of a granular material shaken horizontally is investigated numerically. We find that it is a first-order phase transition and propose two order parameters, namely the averaged kinetic energy and the averaged granular temperature, to determine the fluidization point precisely. It scales as amplitude times square of the frequency of the external vibration. Using t...

– We present an analytical approach to the out of equilibrium dynamics of a class of kinetic lattice gases under gravity. The location of the jamming transition, the critical exponents, and the scaling functions characterizing the relaxation processes are determined. In particular, we find that logarithmic compaction and simple aging are intimately related to the Vogel-Fulcher law, while power-...