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Fluids 2018, 3(3), 58; https://doi.org/10.3390/fluids3030058

Steady Flux Regime During Convective Mixing in Three-Dimensional Heterogeneous Porous Media

CSIRO Energy, Private Bag 10, Clayton South, Victoria 3169, Australia
These authors contributed equally to this work.
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Received: 31 July 2018 / Revised: 9 August 2018 / Accepted: 14 August 2018 / Published: 14 August 2018
(This article belongs to the Special Issue Fundamentals of CO2 Storage in Geological Formations)
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Abstract

Density-driven convective mixing in porous media can be influenced by the spatial heterogeneity of the medium. Previous studies using two-dimensional models have shown that while the initial flow regimes are sensitive to local permeability variation, the later steady flux regime (where the dissolution flux is relatively constant) can be approximated with an equivalent anisotropic porous media, suggesting that it is the average properties of the porous media that affect this regime. This work extends the previous results for two-dimensional porous media to consider convection in three-dimensional porous media. Through the use of massively parallel numerical simulations, we verify that the steady dissolution rate in the models of heterogeneity considered also scales as k v k h in three dimensions, where k v and k h are the vertical and horizontal permeabilities, respectively, providing further evidence that convective mixing in heterogeneous models can be approximated with equivalent anisotropic models. View Full-Text
Keywords: convection; heterogeneity; CO2 sequestration convection; heterogeneity; CO2 sequestration
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Green, C.P.; Ennis-King, J. Steady Flux Regime During Convective Mixing in Three-Dimensional Heterogeneous Porous Media. Fluids 2018, 3, 58.

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