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Pore cross-talk in colloidal filtration

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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Submitted on : Friday, August 31, 2018 - 1:39:55 PM
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Olivier Liot, Akash Singh, Patrice Bacchin, Paul Duru, Jeffrey Morris, et al.. Pore cross-talk in colloidal filtration. Scientific Reports, Nature Publishing Group, 2018, 8 (12460), pp.1-7. ⟨10.1038/s41598-018-30389-7⟩. ⟨hal-01865363⟩



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