Scaling CO<sub>2</sub>–brine mixing in permeable media via analogue models
نویسندگان
چکیده
Supercritical ${\rm CO}_2$ injection and dissolution into deep brine aquifers allow its sequestration within geological formations. After injection, CO}_{2}$ gas phase is buoyancy-driven over the denser aqueous brine, reaching an apparent gravitational stable distribution. However, in propels convection since mixture even than underlying brine. This process still needs to be characterised comprehensively. Here, we investigate irreversible mixing of dissolved through laboratory-scale numerical experiments utilising Hele-Shaw model (Letelier et al. , J. Fluid Mech. vol. 864, 2019, pp. 746–767) a fully miscible two-fluid system. In this scenario, less dense fluid – mimicking with heavier representing catalyses cabbeling-powered convection. Our simulations recover laboratory results porous media by Neufeld ( Geophys. Res. Lett. 37, issue 22, 2010, L22404) may explain scaling law obtained Backhaus Phys. Rev. 106, 10, 2011, 104501) cells. More remarkably, show that mass flux between two analogue fluids, Sherwood number $ {{Sh}}$ obeys universal {{Sh}}\sim {{Ra}}\, \vartheta _{scalar}$ {{Ra}}$ Rayleigh $\vartheta mean scalar dissipation rate. paper sheds light on dynamics solubility trapping carbon sequestration.
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ژورنال
عنوان ژورنال: Journal of Fluid Mechanics
سال: 2023
ISSN: ['0022-1120', '1469-7645']
DOI: https://doi.org/10.1017/jfm.2023.246