2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/20947We examine the hydrodynamics of a granular gas using numerical simulation. We demonstrate the appearance of shearing and clustering instabilities predicted by linear stability analysis, and show that their appearance is directly related to the inelasticity of collisions in the material. We discuss the rate at which these instabilities arise and the manner in which clusters grow and merge.8 pages, 7 figures, 2 in color (Figs. 5 and 6). Fig. 6 is rather large. Submitted to Physical Review ESoft Condensed Mattertext