Onset of Convection in the Presence of a Precipitation Reaction in a Porous Medium: A Comparison of Linear Stability and Numerical Approaches
Autor: | Silvana S. S. Cardoso, Min Chan Kim, Parama Ghoshal |
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Rok vydání: | 2017 |
Předmět: |
precipitation reaction
Convection unstable stratification Materials science reactive-convective dissolution Context (language use) 02 engineering and technology lcsh:Thermodynamics 01 natural sciences 010305 fluids & plasmas chemistry.chemical_compound dissolution-driven convection porous medium diffusive boundary layer onset of convection Flux (metallurgy) lcsh:QC310.15-319 0103 physical sciences Dissolution lcsh:QC120-168.85 Fluid Flow and Transfer Processes Mechanical Engineering Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics Boundary layer chemistry Carbon dioxide lcsh:Descriptive and experimental mechanics 0210 nano-technology Porous medium Linear stability |
Zdroj: | Fluids, Vol 3, Iss 1, p 1 (2017) Fluids; Volume 3; Issue 1; Pages: 1 |
ISSN: | 2311-5521 |
Popis: | Reactive convection in a porous medium has received recent interest in the context of the geological storage of carbon dioxide in saline formations. We study theoretically and numerically the gravitational instability of a diffusive boundary layer in the presence of a first-order precipitation reaction. We compare the predictions from normal mode, linear stability analysis, and nonlinear numerical simulations, and discuss the relative deviations. The application of our findings to the storage of carbon dioxide in a siliciclastic aquifer shows that while the reactive-diffusive layer can become unstable within a timescale of 1 to 1.5 months after the injection of carbon dioxide, it can take almost 10 months for sufficiently vigorous convection to produce a considerable increase in the dissolution flux of carbon dioxide. |
Databáze: | OpenAIRE |
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