Speaker
Description
Mineral precipitation and deposition during reactive flows through porous media are common phenomena in various natural and industrial processes, including biomineralization, marine sedimentation, water treatment, groundwater remediation, concrete carbonation, geothermal energy production, and geologic carbon sequestration. This process typically begins when fluids with different compositions mix and react, leading to supersaturation and the formation of solid-phase minerals. These solid precipitates can either remain suspended in the fluid, altering its apparent viscosity, or deposit onto the surfaces of the porous media, modifying the microstructure and influencing subsequent flow and transport behavior. While much of the literature on this problem has focused on the interaction between reaction and mixing, relatively few studies have explored the dynamics of suspension flow, and even less is known about how reaction and deposition interact with one another.
In this work, we propose a minimal ingredient model that can replicate qualitatively the myriad of complex flow patterns and quantitatively the macroscopic rate of precipitation as observed in past microfluidic experiments. The work highlights the need to capture both the rheology and deposition kinetics of the precipitate suspension in the continuum description of precipitation flow, even for systems with simple chemistry and infinitely fast reaction rates.
| Country | Canada |
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