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Fig. 7. Effect of resolution on pore-size distribution for simulated media. The cumulative pore-size distributions for (A) the sand model and (B) the generated glass bead packings were determined. The numbers in the legend are the resolution of the images in micrometers. The bold black lines with the large symbols show the size distribution computed with the resolution of the measurements with X-rays from tubes or thermal neutrons, respectively. The black curves without symbols were calculated with the highest resolution. The gray lines without symbols correspond to the largest voxel size fulfilling the criterion of a second derivative changing from positive to negative values with increasing pore size.
