In contrast to the effect of φ , as ∆P increases, the overall position of the clogs does not change dramatically, as can be seen by looking down each column. However, l for the longest clogs does increase dramatically with ∆P, regardless of φ . This is seen most clearly when ∆P = 2000 mbar, in the third row of Fig. : the longest clogs reach l = 800 or higher for all three values of φ . In the most dilute suspensions, φ = 0.01% (Figs. ), the discontinuous clogs grow longer in downstream positions of the tapered channels as ∆P increases. When ∆P = 2000 mbar and φ = 0.01% (Fig. ), the longest clogs (l ≈ 400) are located at x ≲ 1 cm. In this most dilute case, particles travel further down a channel to grow a downstream clog before a new clog is formed upstream.