Dynamics of progressive pore clogging by colloidal aggregates

Abstract

The flow of a suspension through a bottleneck often leads to its obstruction. Such a continuous flow to clogging transition has been well characterized when the constriction width to particle...

The contribution of colloidal aggregates to the clogging dynamics at the pore scale

“…We used the methodology developed in Delouche et al [12] to make our model microfluidic filter. All pore walls are made of PDMS to obtain the same particle-surface interactions everywhere on the pore surface [11].…”

“…Details on the synthesis of 1.8 μm PMMA particles can be found in Delouche et al [12]. PS coated particles were synthesized using a type of dispersion polymerization where the dispersant is formed in-situ [13].…”

“…We use the stop and go method to obtain the particle size and shape distribution for all the suspensions we used [12]. Briefly, each suspension is injected inside a straight channel (500 μm wide and 20 μm high) and we applied a rectangular wave pressure such that the suspension first does not move for few seconds allowing us to take non-blurred images of the suspended particles.…”

“…Finally, measuring the variations of the flow conditions across the pore during fouling is required to determine the hydrodynamic resistance of the deposit. As a starting point to tackle these arduous issues, we have recently focused on the dynamics of the particles capture by the forming deposit [12]. We detect all the particles that go across a single pore.…”

Episodicity and Migration of Low Frequency Earthquakes modeled with Fast Fluid Pressure Transients in the Permeable Subduction Interface

“…Thus, the transition between high and low permeability states is very abrupt. Even if they are much smaller than a pore throat, fines and colloids can get stuck through a jamming process at rates that depend on their concentration [1,25,28]. Clogging can be achieved in a matter of minutes [22,28,63].…”