Self-Limited Accumulation of Colloids in Porous Media
| Autor: | M. Bensouda, Philippe Coussot, Gaétan Gerber, David A. Weitz |
|---|---|
| Přispěvatelé: | Laboratoire Navier (navier umr 8205), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS), Harvard University [Cambridge] |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Porous media General Physics and Astronomy Confocal imaging 01 natural sciences [SPI.MAT]Engineering Sciences [physics]/Materials Colloid Adsorption Chemical physics Drag 0103 physical sciences Deposition (phase transition) Particle Charged colloids 010306 general physics Porosity Porous medium Flows in porous media Particle deposition |
| Zdroj: | Physical Review Letters Physical Review Letters, American Physical Society, 2019, 123 (15), ⟨10.1103/PhysRevLett.123.158005⟩ |
| ISSN: | 0031-9007 1079-7114 |
| DOI: | 10.1103/PhysRevLett.123.158005⟩ |
| Popis: | International audience; We present local direct imaging of the progressive adsorption of colloidal particles inside a 3D model porous medium. By varying the interparticle electrostatic interactions, we observe a large range of particle deposition regimes, from a single layer of particles at the surface of the medium to multiple layers and eventually clogging of the system. We derive the complete deposition dynamics and show that colloid accumulation is a self-limited mechanism towards a deposited fraction associated with a balance between the particle interactions and the imposed flow rate. These trends are explained and predicted using a simple probability model considering the particle adsorption energy and the variation of the drag energy with evolving porosity. This constitutes a direct validation of speculated particle transport mechanisms, and a further understanding of accumulation mechanisms. |
| Databáze: | OpenAIRE |
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