Dataset of simulations on particle segregation in confined and non-uniform granular shearing flows

The data correspond to Discrete Element Method (DEM) simulations of dense granular flows composed of bidisperse spherical particles subjected to confined shear under gravity. The simulations were designed to complement annular shear cell experiments and investigate the mechanisms governing size segregation, diffusion, and complex segregation patterns in nonuniform shearing flows. The simulated systems consist of mixtures of inelastic and frictional particles with two different sizes, confined between rough horizontal walls and frictional sidewalls. Shear is imposed through the motion of the bottom boundary while the top wall provides confining pressure. All simulations were performed using the Discrete Element Method implemented in the granular package of LAMMPS. The particle interactions follow a linear spring–dashpot contact model with tangential elasticity and friction. Snapshots of particle states were saved throughout the simulations, allowing detailed analysis of the spatial distribution, segregation rate, and steady-state segregation patterns in the granular flow. These data allow full reproduction of the numerical analysis presented in the paper (https://doi.org/10.1103/fv5r-9dy4) and provide particle-level information for further studies of segregation mechanisms in confined granular flows.