Investigation of CO2 Geologic Sequestration and the Density-driven Convection Process
In this work, the authors present a simulation study of the convection triggered by gravitational instability due to dissolution. By putting a denser fluid on the top, convection occurred as the upper fluid dissolved into the lighter fluid below. Five kinds of heterogeneous porous media are created with different values of correlation length of permeability. Simulation is conducted with compact finite difference scheme of high accuracy order and spectral method. The results show that flow patterns have a significant difference between heterogeneous porous media and homogeneous one.
Keywords: CO2 geologic sequestration, density-driven convection, stream-functionvorticity system, pseudo-spectral method, compact finite difference
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