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Article Dans Une Revue Physical Review Fluids Année : 2022

Flow decline during pore clogging by colloidal particles

Nolwenn Delouche
B. Dersoir
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Résumé

The flow of colloidal suspensions through porous media often leads to the deposition of particles inside the pores which increases the local hydrodynamic resistance by narrowing the pore space available and modifying the flow path of the transported particles. There is a significant flow decline in the extreme case when the entire porous medium becomes clogged. However, there are no experimental studies that determine directly the amplitude of this flow decline when compared with the dynamics of the formation of the particle deposit. This is mainly due to the great challenge of gaining experimental access to the features of the internal structure of the deposit as it grows and thus the ability to determine the flow inside it. In this paper, we show that is possible to monitor the flow decline corresponding to the successive deposition of colloidal particles inside a constriction (pore), ending by its complete blocking. The variation of the flow is determined by the measurement of the velocity of the particles through our channel. Such a technique coupled to the precise knowledge of what is deposited inside the pore, thanks to image analysis, enables us to determine the different contributions to the flow decline. We also use numerical simulations to access the flow inside the porous structure of the deposit as it grows. Together, experiments and simulations demonstrate that the obstruction process and the subsequent limited growth of the clog, corresponding to a few layers of accumulated particles, have a higher impact on the amplitude of the flow decline than the extra growth of the clog.
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Dates et versions

hal-03657591 , version 1 (09-05-2022)

Licence

Paternité - Pas d'utilisation commerciale

Identifiants

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Nolwenn Delouche, B. Dersoir, A. B. Schofield, Hervé Tabuteau. Flow decline during pore clogging by colloidal particles. Physical Review Fluids, 2022, 7 (3), pp.034304. ⟨10.1103/PhysRevFluids.7.034304⟩. ⟨hal-03657591⟩
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