The authors perform Monte Carlo simulations of the pouring of elliptical particles into a two-dimensional box under the influence of a uniform gravitational field. Ellipses with sufficiently large aspect ratios form novel packings that they call nematic glasses. The granules in these packings are ordered orientationally, and yet the packings are amorphous. A heuristic explanation of the formation of this state is presented.
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Buchalter et al. (1992) studied this question.
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