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arXiv · 1711.10881

Pore cross-talk in colloidal filtration

Olivier Liot·Akash Singh·Patrice Bacchin·Paul Duru·Jeffrey F. Morris·Pierre Joseph
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Abstract

Blockage of pores by particles is found in many processes, including filtration and oil extraction. We present filtration experiments through a linear array of ten channels with one dimension which is sub-micron, through which a dilute dispersion of Brownian polystyrene spheres flows under the action of a fixed pressure drop. The growth rate of a clog formed by particles at a pore entrance systematically increases with the number of already saturated (entirely clogged) pores, indicating that there is an interaction or "cross-talk" between the pores. This observation is interpreted based on a phenomenological model, stating that a diffusive redistribution of particles occurs along the membrane, from clogged to free pores. This one-dimensional model could be extended to two-dimensional membranes.

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Olivier Liot, Akash Singh, Patrice Bacchin, Paul Duru, Jeffrey F. Morris, Pierre Joseph. 2018-02-23. Pore cross-talk in colloidal filtration. https://arxiv.org/abs/1711.10881

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