Parameterization of drag and dissolution of rising CO 2 drops in seawater
In this work the dynamics and dissolution of a hydrate‐covered CO 2 drop were studied, using a numeric model and data from one of very few CO 2 experiments performed in the real ocean. A theory including the standard drag curve of rigid spheres was shown not to fit the observed drop rise velocity. H...
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Published in | Geophysical research letters Vol. 32; no. 10 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
01.05.2005
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Online Access | Get full text |
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Summary: | In this work the dynamics and dissolution of a hydrate‐covered CO
2
drop were studied, using a numeric model and data from one of very few CO
2
experiments performed in the real ocean. A theory including the standard drag curve of rigid spheres was shown not to fit the observed drop rise velocity. However, a drag parameterization supported by numerous laboratory experiments with gas bubbles provides a good match of the observed rise velocity of a liquid CO
2
drop covered with hydrate. The results confirm laboratory results showing that shape is a key factor determining the CO
2
drop dynamics. We also found that hydrate reduces the mass transfer of the observed drop by a factor of 2, which is compatible with laboratory experiments. Numerical experiments with different drop sizes showed that the choice of drag parameterization has a significant impact on the estimated vertical distribution of dissolved CO
2
. |
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ISSN: | 0094-8276 1944-8007 |
DOI: | 10.1029/2005GL022637 |