Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR023019 |
Calculating Trajectories Associated With Solute Transport in a Heterogeneous Medium | |
Vasco, D. W.1; Pride, Steven R.1; Zahasky, Christopher2; Benson, Sally M.2 | |
2018-09-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:9页码:6890-6908 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We present a trajectory-based technique for calculating solute transport in a porous medium that has several advantages over existing methods. Unlike streamlines, the extended trajectories are influenced by each of the important parameters governing transport, including molecular diffusion and transverse dispersion. The approach is complete and does not require any additional techniques, such as operator splitting or particle tracking, in order to account for the full dispersion tensor. The semianalytic expressions make it clear how the flow field, the concentration distribution, and the dispersion tensor contribute to the velocity field of an injected solute. The equations are valid for an arbitrary porous medium, including those with rapid spatial variations in properties, overcoming limitations faced by previous approaches based upon asymptotic techniques. A test on a layered model with sharp boundaries indicates that the extended trajectories are compatible with the results of a numerical simulator and differ from streamlines. We also describe a new form of the dispersion tensor that incorporates a known asymmetry. The trajectories indicate that the modifications of the dispersion tensor lead to more focused transport within regions of high conductivity. Finally, the trajectories are used to define a semianalytic relationship between solute travel times and variations in solute velocities along a path that may be used for tomographic imaging. In an application to the injection of a radioactive tracer into a Berea sandstone core, monitored using micropositron emission tomographic (micro-PET) observations, the sensitivities are used to map the spatial variations of permeability within the core. Plain Language Summary We describe a new approach to calculating the trajectories of solute moving in a flow field. The paths reflect the effects of the physical processes influencing the solute migration. The trajectories are useful for visualization of solute transport and for efficient imaging approaches that resemble medical tomography. |
英文关键词 | tracer transport streamlines solute transport inverse modeling visualization |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448088100058 |
WOS关键词 | STREAMLINE-BASED SIMULATION ; POROUS-MEDIA ; IRREVERSIBLE-PROCESSES ; RECIPROCAL RELATIONS ; STOCHASTIC-ANALYSIS ; REACTIVE TRANSPORT ; GROUNDWATER-FLOW ; TRACER TRANSPORT ; DISPERSION ; TIME |
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/21478 |
专题 | 资源环境科学 |
作者单位 | 1.Lawrence Berkeley Natl Lab, Energy Geosci Div, Berkeley, CA 94720 USA; 2.Stanford Univ, Dept Energy Resources Engn, Stanford, CA 94305 USA |
推荐引用方式 GB/T 7714 | Vasco, D. W.,Pride, Steven R.,Zahasky, Christopher,et al. Calculating Trajectories Associated With Solute Transport in a Heterogeneous Medium[J]. WATER RESOURCES RESEARCH,2018,54(9):6890-6908. |
APA | Vasco, D. W.,Pride, Steven R.,Zahasky, Christopher,&Benson, Sally M..(2018).Calculating Trajectories Associated With Solute Transport in a Heterogeneous Medium.WATER RESOURCES RESEARCH,54(9),6890-6908. |
MLA | Vasco, D. W.,et al."Calculating Trajectories Associated With Solute Transport in a Heterogeneous Medium".WATER RESOURCES RESEARCH 54.9(2018):6890-6908. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论