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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

EXPERIMENTAL STUDY OF DENSITY-DRIVEN-CONVECTION MIXING BETWEEN MISCIBLE FLUIDS IN HELE-SHAW GEOMETRY

Get access (open in a dialog) DOI: 10.1615/IHTC16.cov.023743
pages 3159-3166

Sinopsis

Carbon dioxide geological storage (CGS) is a preferred technique to reduce factitious climate change. In terms of CGS, density-driven natural convection dominated dissolution of CO2 into formation brine results in a stable trapping increasing the storage security. In this paper, density-driven-convection mechanism is investigated in an updated Hele-Shaw cell which adds a sealing device in the below of the cell with dyed sodium chloride solution and pure water instead of CO2-diffusive layer and brine. Initially, several bumps form at the interface and extend straight downward. These initial fingers grow independently, when the fingers are broad enough to coalesce with adjacent fingers, they merge into larger fingers. Our results show that the finger extension velocity and the initial Sherwood number is proportional to the Rayleigh number, t(-1/2) and Ra is a linear relationship(t is the convection onset time), the density difference has greater influence on convection with the decrease of H, characteristic length.