The number of clogs N formed in the microfluidic device under different conditions of φ and ∆P is presented in Table . Generally, more clogs form in higher conditions of φ and ∆P 21 . Compared to ∆P, φ has a greater effect on the rate of clogging. An order of magnitude variation in ∆P and φ does not produce similar effects on N. Increasing ∆P from 200 to 2000 mbar increases N by ∼40-50%. However, N increases by a factor of ∼2 or more for all ∆P when φ increases by an order of magnitude from 0.01 to 0.10%. Increasing either ∆P or φ delivers more particles to the microchannels over the course of the flow test, thus also increasing N. See Fig. and Table in SI for a comparison of the frequency of clogging in Batch 1 and Batch 2. In both, φ increases the clogging frequency at a rate higher than ∆P. As seen in Fig. , increasingly longer clogs are formed as either ∆P or φ increases. Each panel shows l as a function of ∆P for a different φ condition. When φ = 0.01% (Fig. ), l increases monotonically with ∆P. At ∆P = 200 and 500 mbar, even the longest clogs are all less than l ≈ 130. l grows beyond 350 and up to 750 when ∆P = 2000 mbar. As φ increases (Fig. and), l still increases with ∆P. However, now an apparent plateau appears at low ∆P. Below ∆P = 900 mbar, l does not exceed ∼ 350 at either φ = 0.05 or 0.10%. Beyond ∆P = 900 mbar, l grows significantly, with the longest clogs increasing from l ≈ 600 to 900 when φ = 0.05%, and up to 1400 when φ = 0.10%. Thus, it appears there are two regimes of ∆P, which also manifests in measurements of flowrate decay dynamics .