Year: 2025
Type: article
Abstract: In this work, we investigate the jamming behavior of associative microgel suspensions used as fluid loss additives in model porous media. We first construct a phase diagram using drying experiments, followed by characterization of the suspensions' rheology and the permeability of the filter cakes at maximum microgel concentration. Microfluidic devices are designed for frontal and lateral flow filtration with pore sizes comparable to or slightly larger than the microgel particles. Microscopic observations reveal irreversible aggregation as the particles pass through pores, leading to cake formation inside and at the exit of the pores—contrary to the classical view of cake formation. Flow in linear channels of similar pore size, however, does not cause jamming, suggesting that extensional shear plays a crucial role. We hypothesize that extensional flows promote the association of hydrophobic groups by unfolding dangling chains, resulting in low‐permeability filter cakes with self‐adaptive properties for larger pore networks.
Source: AIChE Journal
DOI: 10.1002/aic.18876
Authors: Swati Kaushik, Steven Meeker, Guillaume Ovarlez
Language: English
Subfield: Ocean Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,940
OpenAlex ID: W4403362677