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DOI | 10.1029/2021GL096280 |
Sharp transition to strongly anomalous transport in unsaturated porous media | |
André; s Velá; squez-Parra; Tomá; s Aquino; Matthias Willmann; Yves Mé; heust; Tanguy Le Borgne; Joaquí; n Jimé; nez-Martí; nez | |
2022-01-19 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2022 |
英文摘要 | The simultaneous presence of liquid and gas in porous media increases flow heterogeneity compared to saturated flows. However, the impact of saturation on flow and transport has so far remained unclear. The presence of gas in the pore space leads to flow reorganisation. We develop a theoretical framework that captures the impact of that reorganization on pore-scale fluid velocities. Preferential flow is distributed spatially through a backbone and flow recirculation occurs in flow dead-ends. We observe, and predict theoretically, that this previously-identified flow structure induces a marked change in the scaling of the velocity probability density function compared to the saturated configuration, and a sharp transition to strongly anomalous transport. We develop a transport model using the continuous time random walk theory that predicts advective transport dynamics for all saturation degrees. Our results provide a new modeling framework linking phase heterogeneity to flow heterogeneity in unsaturated media. |
领域 | 气候变化 |
URL | 查看原文 |
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/346148 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | André,s Velá,squez-Parra,et al. Sharp transition to strongly anomalous transport in unsaturated porous media[J]. Geophysical Research Letters,2022. |
APA | André.,s Velá.,squez-Parra.,Tomá.,s Aquino.,...&nez.(2022).Sharp transition to strongly anomalous transport in unsaturated porous media.Geophysical Research Letters. |
MLA | André,et al."Sharp transition to strongly anomalous transport in unsaturated porous media".Geophysical Research Letters (2022). |
条目包含的文件 | 条目无相关文件。 |
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