Since clogs span the width of the constriction, the clog width equals the channel width, w = w c . Due to the tapered angle, w(x) = w o + (2 tan θ )x, where w o ≈ 4 µm and x = 0 cm indicates the channel outlet. Presented in Fig. is a scatter plot of w as a function of x for the clogs shown in Fig. . The line of best fit confirms θ ≈ 0.02 • . However, w ≪ w c for some bright spots or streaks in the tiled image. These are particles in the channels which are not associated with a clog. Objects outside the range w(x) ± 2d p , shown by the dotted lines, are therefore not included in the spatial distribution analyses. In Fig. , there are 166 bright spots not associated with clogs. This corresponds to a percentage, α ≈15%, of the total number of bright spots or streaks; the vast majority of which, ∼85%, represents discontinuous clogs.