Data for Freeman et al., Granular Matter 2019

Data from experiments and simulations studying how rods pack randomly into containers.

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Rod packing data

These data sets were studied in:

Figure 4 data (bulk experiment)

Data for observed volume fraction from bulk experiments. We'll describe the columns of this file, but first, note that 'rod' represents our cylindrical particles, and 'cylinder' represents our cylindrical containers used to conduct the experiment. Column descriptions:
  1. Rod: The first number indicates diameter size by fractions of an inch. 16 means 1/16 in (1.59 mm) diameter rods, and 8 means 1/8 in (3.18 mm) diameter rods. The second number indicates the length of the rod in aspect ratios of the diameter. 16A4 indicates a rod of diameter 1/16in (1.59 mm) and a length approximately 4 times longer than the diameter, 1/4 in (6.36 mm). Marble indicates measurements taken with marbles, set to aspect ratio 1.
  2. AR: Aspect ratio of the rod/marble.
  3. L: Average length of 10 rods picked at random from the rod set (cm).
  4. Cyl: Cylinder indicator. Each cylinder used for testing was numbered. The numbers are unordered, and larger cylinder numbers do not correlate with larger containers. Cylinders identified by just a number are tall height cylinders (12.8 cm, 12.5 for two very thin cylinders). Cylinders marked with S indicate that the cylinder comes from a shorter set of cylinders (~7.3 cm). Cylinders marked with an H represent trials from different heights between our main tall and short data sets, with heights of 10 cm and 4 cm.
  5. R: Radius of cylinder (cm).
  6. H: Height of cylinder (cm).
  7. Phi: Volume fraction from 5 averaged packing trials for a specific rod set in a specific container.
  8. Vol: Calculated volume of each cylinder (cm^3).
  9. StDev: Standard deviations for each Phi value.
The data with H ~ 12.8 cm are the points plotted in Fig. 4(a) of our paper, and with H ~ 7.4 cm are the points plotted in Fig. 4(b). The other data (H = 4 cm, H = 10 cm) were used to calculate data for Fig. 5. Two other heights are used; these correspond to tall cylinders that are filled only to a height marked by an inscribed line.

Figure 5 data (bulk experiment)

Figure 6 data (experiments and simulation)

Figures 7-10 data (x-ray experiments)

The voxel size in the raw images is 0.2 mm on a side. The files in are numbered in a way that clearly corresponds with the raw data (for example, "Orilarge3.txt").

Figure 11 data (simulation)

Figure 12 data (simulation)

Figure 13 data (simulation)