Dissolution and dispersion of a carbon dioxide jet in the deep ocean
1993; Elsevier BV; Volume: 34; Issue: 9-11 Linguagem: Inglês
10.1016/0196-8904(93)90027-8
ISSN1879-2227
AutoresMasao Morishita, Kathleen Cole, G. R. Stegen, Hidetoshi Shibuya,
Tópico(s)Atmospheric and Environmental Gas Dynamics
ResumoThe initial dissolution and mixing of a liquid CO2 jet in the deep ocean is predicted with a jet integral mixing model, incorporating CO2 chemistry. This model incorporates the hydrodynamics of initial dissolution and diffusion during the period of time when momentum and kinetic energy of the jet are greater than that of the ambient sea water. The model includes equations of state for CO2 and its dissolution products; carbonate, bicarbonate and aqueous CO2. Adjustable model parameters include discharge velocity, discharge depth, discharge temperature, and ambient current velocity. Our study shows that the buoyant rise or decent of the plume, and hence initial dilution, is very sensitive to the density of the CO2/sea water mixture. CO2 dissolution is rapid, with most of the liquid CO2 dissolving in the initial 100 seconds. The density of the resultant mixture is strongly affected by the concentration of dissolved CO2 which is in turn strongly influenced by entrainment. The density difference between ambient sea water and the CO2/sea water mixture increases with depth. For discharges of CO2 below 1000 m, the jet is negatively buoyant under most initial conditions.
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