Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR023810 |
Upscaling and Prediction of Lagrangian Velocity Dynamics in Heterogeneous Porous Media | |
Hakoun, Vivien1; Comolli, Alessandro1,2; Dentz, Marco1 | |
2019-05-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:5页码:3976-3996 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain; Belgium |
英文摘要 | The understanding of the dynamics of Lagrangian velocities is key for the understanding and upscaling of solute transport in heterogeneous porous media. The prediction of large-scale particle motion in a stochastic framework implies identifying the relation between the Lagrangian velocity statistics and the statistical characteristics of the Eulerian flow field and the hydraulic medium properties. In this paper, we approach both challenges from numerical and theoretical points of view. Direct numerical simulations of Darcy-scale flow and particle motion give detailed information on the evolution of the statistics of particle velocities both as a function of travel time and distance along streamlines. Both statistics evolve from a given initial distribution to different steady-state distributions, which are related to the Eulerian velocity probability density function. Furthermore, we find that Lagrangian velocities measured isochronally as a function of travel time show intermittency dominated by low velocities, which is removed when measured equidistantly as a function of travel distance. This observation gives insight into the stochastic dynamics of the particle velocity series. As the equidistant particle velocities show a regular random pattern that fluctuates on a characteristic length scale, it is represented by two stationary Markov processes, which are parametrized by the distribution of flow velocities and a correlation distance. The velocity Markov models capture the evolution of the Lagrangian velocity statistics in terms of the Eulerian flow properties and a characteristics length scale and shed light on the role of the initial conditions and flow statistics on large-scale particle motion. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000474848500020 |
WOS关键词 | SOLUTE TRANSPORT ; ANOMALOUS TRANSPORT ; STOCHASTIC-ANALYSIS ; FRACTURE NETWORKS ; INJECTION MODE ; MASS-TRANSFER ; DISPERSION ; TIME ; PORE ; AQUIFERS |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
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/183128 |
专题 | 资源环境科学 |
作者单位 | 1.Spanish Council Sci Res, CSIC, Inst Environm Assessment & Water Res IDAEA, Barcelona, Spain; 2.ULB, Fac Sci, Nonlinear Phys Chem Unit, Brussels, Belgium |
推荐引用方式 GB/T 7714 | Hakoun, Vivien,Comolli, Alessandro,Dentz, Marco. Upscaling and Prediction of Lagrangian Velocity Dynamics in Heterogeneous Porous Media[J]. WATER RESOURCES RESEARCH,2019,55(5):3976-3996. |
APA | Hakoun, Vivien,Comolli, Alessandro,&Dentz, Marco.(2019).Upscaling and Prediction of Lagrangian Velocity Dynamics in Heterogeneous Porous Media.WATER RESOURCES RESEARCH,55(5),3976-3996. |
MLA | Hakoun, Vivien,et al."Upscaling and Prediction of Lagrangian Velocity Dynamics in Heterogeneous Porous Media".WATER RESOURCES RESEARCH 55.5(2019):3976-3996. |
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