GROWTH OF DISK-SHAPED BUBBLES IN SEDIMENTS
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dc.contributor.author | Gardiner B.S. | |
dc.contributor.author | Boudreau B.P. | |
dc.contributor.author | Johnson B.D. | |
dc.date.accessioned | 2021-12-24T05:12:37Z | |
dc.date.available | 2021-12-24T05:12:37Z | |
dc.date.issued | 2003 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=1469670 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 2003, 67, 8, 1485-1494 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/33783 | |
dc.description.abstract | Disc-shaped methane bubbles, often observed in marine sediments, result from growth in a medium that elastically resists expansion of the bubbles and yields by fracture. We have modeled this process to obtain estimates of growth times by using a reaction-diffusion model coupled to a linear elastic fracture mechanics (LEFM). For comparison, we also modeled the growth of a constant eccentricity bubble in a nonresistant medium. Discoidal bubbles that grow in sediments that obey LEFM grow much faster than spherical bubbles (two- to fourfold faster for the times and conditions tested here) and become more eccentric with time (aspect ratios falling from 0.3 to 0.03 over 8 d of growth). In addition, their growth is not continuous but punctuated by fracture events. Furthermore, under some conditions, LEFM predicts that bubble growth can become arrested, which is not possible for a bubble in a nonresistant medium, even for nonspherical bubbles. Cessation of growth occurs when the dissolved gas concentration gradient near the bubble surface disappears as a result of the increase in bubble gas pressure needed to overcome sediment elasticity. | |
dc.title | GROWTH OF DISK-SHAPED BUBBLES IN SEDIMENTS | |
dc.type | Статья |
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