Clogging probability in specific channel width positions strongly depends on φ . For fixed ∆P = 1000 mbar, Fig. shows that P(W > w) increases with increasing φ for almost the entire range of w. Convergence is observed only where w = 1, indicating l l l l l l l l l Fig. Scatter plots of normalized clog lengths l versus their location in the x-axis of the Cartesian plane. x = 0 cm corresponds to the outlet of the tapered channels, x = 2 cm is approximately the midpoint while x = 4 cm in the inlet area, as illustrated in Fig. . A different condition of constant φ is presented in each column while ∆P is varied in each row. It shows the longest clogs are positioned downstream of the channels (x < 2 cm) as ∆P increases; but increasing φ shifts their location more upstream (x > 2 cm).