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DOI | 10.1002/2017GL073161 |
Linear permeability evolution of expanding conduits due to feedback between flow and fast phase change | |
Wang, Lichun; Cardenas, M. Bayani | |
2017-05-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Conduits are ubiquitous and critical pathways for many fluids relevant for geophysical processes such as magma, water, and gases. Predicting flow through conduits is challenging when the conduit geometry coevolves with the flow. We theoretically show that the permeability (k) of a conduit whose walls are eroding due to fast phase change increases linearly with time because of a self-reinforcing mechanism. This simple result is surprising given complex feedbacks between flow, transport, and phase change. The theory is congruent with previous experimental observations of fracture dissolution in calcite. Supporting computational fracture dissolution experiments showed that k only slightly increases until the dissolution front reaches the narrowest conduit constriction, after which the linear evolution of k manifests. The theory holds across multiple scales and a broad range of Peclet and Damkohler numbers and thus advances the prediction of dynamic mass fluxes through expanding conduits in various geologic and environmental settings. Plain Language Summary Geological conduits are ubiquitous present in the subsurface. In many situations, these conduits may enlarge through time due to erosion of its walls by dissolution and melting. This leads to strongly coupled flow and reactive transport processes where the flow dictates the wall's erosion and vice versa. As the conduit expands, so does its permeability and thus flow. Thus, predicting fluid flow and relevant transport processes through expanding conduits is challenging. In this study, we presented a theory for the linear time dependence of permeability for expanding conduits. The theory is congruent with previous observations from fracture dissolution in calcite. An additional series of our own computational experiments also aligns with the theory. The theory will be of interest to geoscientists and engineers in many fields such as hydrology, glaciology, and petroleum engineering, to name a few. |
英文关键词 | permeability conduit fracture fluid flow reactive transport phase change |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000402143700019 |
WOS关键词 | FRACTURE DISSOLUTION ; ICE-SHEET ; CUBIC LAW ; ORIGIN ; DEFORMATION ; ENCELADUS ; RESERVOIR ; DRAINAGE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26388 |
专题 | 气候变化 |
作者单位 | Univ Texas Austin, Geol Sci, Austin, TX 78712 USA |
推荐引用方式 GB/T 7714 | Wang, Lichun,Cardenas, M. Bayani. Linear permeability evolution of expanding conduits due to feedback between flow and fast phase change[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(9). |
APA | Wang, Lichun,&Cardenas, M. Bayani.(2017).Linear permeability evolution of expanding conduits due to feedback between flow and fast phase change.GEOPHYSICAL RESEARCH LETTERS,44(9). |
MLA | Wang, Lichun,et al."Linear permeability evolution of expanding conduits due to feedback between flow and fast phase change".GEOPHYSICAL RESEARCH LETTERS 44.9(2017). |
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