The above results and analysis may suggest the presence of a critical pressure near ∆P ≈ 900 -1000 mbar. As seen in Figs. , above this ∆P, clogs grow dramatically longer. At φ = 0.01%, the lengthening of clogs appears gradual (Fig. ). But at higher volume fractions, φ = 0.05 and 0.10 %, this lengthening occurs after a low-pressure plateau below ∆P = 900 mbar, and is more dramatic (Figs. and). The location of these long clogs, in turn, depends on φ , with the most dilute conditions facilitating particle transport to lengthen downstream clogs. This ability of clogs to grow significantly longer at higher ∆P may suggest that pressure can disrupt the process of clogging. Lower ∆P conditions form many short clogs, particularly in higher φ conditions. Higher ∆P can disrupt potential clog formation, sending individual particles downstream to lengthen existing clogs.