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Clogging transition induced by self filtration in a slit pore
B Dersoir1, A B Schofield2, H Tabuteau1
1IPR Université Rennes 1UMR CNRS 6251, Milieux Divisés, 263 avenue du Gal Leclerc, Rennes, France. herve.tabuteau@univ-rennes1.fr.
Soft Matter
|February 18, 2017
Summary
Particle clogging in porous media is poorly understood. This study reveals particle deposition modes and hydrodynamic interactions governing clog formation, enabling prediction via a phase diagram.
Area of Science:
- Fluid dynamics
- Porous media physics
- Particle transport
Background:
- Pore clogging by flowing particles is a common issue in soils, filters, and arteries.
- Existing research has not fully elucidated the dynamics and mechanisms of clog formation at the particle scale.
Purpose of the Study:
- To investigate the particle-scale clogging mechanism in a slit pore.
- To identify particle deposition modes and predict deposition rates.
- To understand the influence of pore geometry and particle interactions on clog morphology.
Main Methods:
- Coupling two experimental techniques to observe particle deposition.
- Analysis of particle-scale interactions within a slit pore slightly larger than particle diameter.
Main Results:
- Identification of all particle deposition modes during clog formation.
- Accurate prediction of particle deposition rates.
- Demonstration that hydrodynamic interactions, not direct capture, dominate clog formation.
- Observation that pore geometry and deposition mode competition significantly alter clog morphology.
Conclusions:
- Clog formation is primarily driven by hydrodynamic interactions between flowing and immobilized particles.
- A comprehensive phase diagram can classify clogging regimes based on flow conditions and filter design.
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