Figure 5
From: Flow dynamics through discontinuous clogs of rigid particles in tapered microchannels
The presence of two \(\Delta P\) regions (one below and above \(\Delta P = 1000\) mbar), indicating significant differences in particle packing in the channels after “full clogging” is established. This is illustrated by (a) Device permeability (\(\kappa\)) estimated by fitting the final flowrate (\(Q_f\)) to Darcy’s Law. Inset: the ratio of \(\kappa\) for \(\Delta P < 1000\) mbar region to \(\Delta P \ge 1000\) mbar (\(\kappa _1/\kappa _2\)) slightly decreased as \(\phi\) was increased. (b) Percentage of device volume occupied by particles (\(\chi\)). Inset: percentage of voids in the clogged device (porosity). (c) Coverage (\(\psi\)) is the percentage of the total channel area filled with clogs. (d) Number of clogging events (N). In all cases of \(\Delta P\) and \(\phi\), N is greater than the total number of channels.
