  Granular material is showing very often in geotechnical engineering,
petroleum engineering, material science and physics. The packings of the
granular material play a very important role in their mechanical behaviors,
such as stress-strain response, stability, permeability and so on. Although
packing is such an important research topic that its generation has been
attracted lots of attentions for a long time in theoretical, experimental, and
numerical aspects, packing of granular material is still a difficult and active
research topic, especially the generation of random packing of non-spherical
particles. To this end, we will generate packings of same particles with same
shapes, numbers, and same size distribution using geometry method and dynamic
method, separately. Specifically, we will extend one of Monte Carlo models for
spheres to ellipsoids and poly-ellipsoids.
