76 citations · 339 across the 17 of their papers we have counts for
14 papers · 1 filter
Granular packing simulation protocols: tap, press and relax
A. P. Santos, Ishan Srivastava, Leonardo E. Silbert +2
Granular matter takes many paths to pack. Gentle compression, compaction or repetitive tapping can happen in natural and industrial processes. The path influences the packing micro…
Fractal dimensions of jammed packings with power-law particle size distributions in two and three dimensions
Joseph M. Monti, Ishan Srivastava, Leonardo E. Silbert +2
Static structure factors are computed for large-scale, mechanically stable, jammed packings of frictionless spheres (three dimensions) and disks (two dimensions) with broad, power-…
Large-scale frictionless jamming with power-law particle size distributions
Joseph M. Monti, Joel T. Clemmer, Ishan Srivastava +3
Due to significant computational expense, discrete element method simulations of jammed packings of size-dispersed spheres with size ratios greater than 1:10 have remained elusive,…
Fluctuations and power-law scaling of dry, frictionless granular rheology near the hard-particle limit
A. P. Santos, Ishan Srivastava, Leonardo E. Silbert +2
The flow of frictionless granular particles is studied with stress-controlled discrete element modeling simulations for systems varying in size from 300 to 100,000 particles. The v…
Shear Is Not Always Simple: Rate-Dependent Effects of Flow Type on Granular Rheology
Joel T. Clemmer, Ishan Srivastava, Gary S. Grest +1
Despite there being an infinite variety of types of flow, most rheological studies focus on a single type such as simple shear. Using discrete element simulations, we explore bulk…
Jamming of Bidisperse Frictional Spheres
Ishan Srivastava, Scott A. Roberts, Joel T. Clemmer +3
By generalizing a geometric argument for frictionless spheres, a model is proposed for the jamming density of mechanically stable packings of bidisperse, frictional spheres.…
Flow and Arrest in Stressed Granular Materials
Ishan Srivastava, Leonardo E. Silbert, Jeremy B. Lechman +1
Flowing granular materials often abruptly arrest if not driven by sufficient applied stresses. Such abrupt cessation of motion can be economically expensive in industrial materials…
Granular packings with sliding, rolling and twisting friction
A. P. Santos, Dan S. Bolintineanu, Gary S. Grest +4
Intuition tells us that a rolling or spinning sphere will eventually stop due to the presence of friction and other dissipative interactions. The resistance to rolling and spinning…
Viscometric flow of dense granular materials under controlled pressure and shear stress
Ishan Srivastava, Leonardo E. Silbert, Gary S. Grest +1
This study examines the flow of dense granular materials under external shear stress and pressure using discrete element method simulations. In this method, the material is allowed…
Evolution of Internal Granular Structure at the Flow-Arrest Transition
Ishan Srivastava, Jeremy B. Lechman, Gary S. Grest +1
The evolution of the internal granular structure in shear-arrested and shear-flowing states of granular materials is characterized using fabric tensors as descriptors of the intern…
Effect of Shape and Friction on the Packing and Flow of Granular Materials
K. Michael Salerno, Dan S. Bolintineanu, Gary S. Grest +4
The packing and flow of aspherical frictional particles are studied using discrete element simulations. Particles are superballs with shape that varie…
Flow-Arrest Transitions in Frictional Granular Matter
Ishan Srivastava, Leonardo E. Silbert, Gary S. Grest +1
The transition between shear-flowing and shear-arrested states of frictional granular matter is studied using constant-stress discrete element simulations. By subjecting a dilute s…
Local Plasticity as the Source of Creep and Slow Dynamics in Granular Materials
Ishan Srivastava, Timothy S. Fisher
Creep mechanisms in uniaxially compressed 3D granular solids comprised of faceted frictionless grains are studied numerically using a constant pressure and constant stress simulati…
Variable-cell method for stress-controlled jamming of athermal, frictionless grains
Kyle C. Smith, Ishan Srivastava, Timothy S. Fisher +1
A new method is introduced to simulate jamming of polyhedral grains under controlled stress that incorporates global degrees of freedom through the metric tensor of a periodic cell…