Particle shape dependence in 2D granular media

@article{SaintCyr2012ParticleSD,
  title={Particle shape dependence in 2D granular media},
  author={Baptiste Saint-Cyr and Krzysztof Szarf and Charles Voivret and Emilien Az'ema and Vincent Richefeu and Jean-Yves Delenne and Ga{\"e}l Combe and C{\'e}cile Nouguier-Lehon and Paul V. Villard and Philippe Sornay and Marie Chaze and Farhang Radjai},
  journal={arXiv: Soft Condensed Matter},
  year={2012}
}
Particle shape is a key to the space-filling and strength properties of granular matter. We consider a shape parameter $\eta$ describing the degree of distortion from a perfectly spherical shape. Encompassing most specific shape characteristics such as elongation, angularity and nonconvexity, $\eta$ is a low-order but generic parameter that we used in a numerical benchmark test for a systematic investigation of shape-dependence in sheared granular packings composed of particles of different… 

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