A Model for Granular Texture with Steric Exclusion
  We propose a new method to characterize the geometrical texture of a granular packing at the particle scale including the steric hindrance effect. This method is based on the assumption of a maximum disorder (entropy) compatible both with strain-induced anisotropy of the contact network and steric exclusions. We show that the predicted statistics for the local configurations is in a fairly agreement with our numerical data. 
H. Troadec, F. Radjai, S. Roux, J.C. Charmet