Relatively short clogs are formed in low φ and ∆P conditions, as seen in Fig. . These clogs are positioned downstream, at small x, towards the outlet of the channels. As φ increases, the additional clogs appear at larger x, upstream toward the inlet area. This can be seen in the progression of the scatter plots from left to right in all three rows, for each ∆P condition. However, increasing φ in low ∆P conditions does not appreciably increase l: for instance, most clogs formed at ∆P = 200 and 500 mbar (Figs. ) remain below l = 200, with only one clog longer than l = 300.