This chapter provides a brief review of some algorithms used to construct model granular media (packings of spheres), together with a comparison of reuslts obtained on tessellations of those packings. The computational algorithms involve several techniques, including : a Random Sequential Adsorption paproach (RSA), an Event-Driven model (ED), a Molecular Dynamics code (MD), a Smoothed Particle Hydrodynamics approach (SPH) and the classical static algorithm for dense packings of spheres. These techniques model static or dynamic interactions between the particles and give different geometries even for the same mean solid fraction. These numerical methods can apply to two or three-dimensional packings.
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