Starting from three-dimensional volume data of a granular packing, as, e.g., obtained by X-ray Computed Tomography, we discuss methods to first detect the individual particles in the sample and then analyze their properties. This analysis includes the pair correlation function, the volume and shape of the Voronoi cells, and the number and type of contacts formed between individual particles. We mainly focus on packings of monodisperse spheres, but we will also comment on other monoschematic particles such as ellipsoids and tetrahedra. This paper is accompanied by a package of free software containing all programs (including source code) and an example three-dimensional dataset which allows the reader to reproduce and modify all examples given.
180° for a parallel X-ray beam, as, e.g., delivered by a synchrotron. 360° if the beam expands from a point source, as in a normal X-ray tube.
The term voxel is used in two ways: to refer to the cuboidal image element itself and as a unit of length equivalent to one edge of this cube.
In a system of soft particles, this broadening might also be due to deformations of the particles.61
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