In the flow tests described here, w c /d p varies continuously within a single device. The effect of geometry on clogging can be assessed simply by investigating different regions of a single fluidic device. Here, clogging is described by the survivor functions of the empirical analyses. These are complements of the cumulative distribution function. They can describe the decreasing probability of clogging with increasing w c /d p and the sensitivity of burst sizes to the presence of obstacles in flow systems that clog intermittently . The effect of ∆P and φ on the clogging process can be investigated by examining the survivor functions in different experimental conditions.