The packing of cylindrical particles with log-normal and plastic industries, but with a lack of quantitative and predictive modified power-law length distributions has been experiinformation. The results are useful for a better understanding of mentally studied. The results indicate that the packing the nature of nonspherical particle packing. density is heavily dependent on the parameters in the two distributions. However, this dependence cannot be pre-II. Experimental Details dicted by the direct analogy to that for the packing of spherical particles. It is postulated that the packing of non-In this work, we only considered the packing of cylindrical spherical particles be governed by two factors: the shape particles of uniform diameter, d, with their lengths varying effect and the size effect, which respectively correspond to according to a given length distribution. For convenience, a the unmixing and mixing states of a particle mixture and dimensionless length, l c , defined as the length-to-diameter ratio are quantified from the specific volumes of the two states.of a cylinder, was used. Because d was constant, this treatment Analysis of the results suggests that the shape effect is domiwould not affect the results. Two length-distribution functions nant for the packing of cylindrical particles with a wide were used. They were the log-normal distribution and the modilength distribution.fied power-law distribution. These two distributions, in terms of the cumulative function F(l c ), are given as (i) the log-normal (LN) distribution function

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