Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR019912 |
Observations of the impact of rock heterogeneity on solute spreading and mixing | |
Boon, Maartje1,2; Bijeljic, Branko1,2; Krevor, Samuel1,2 | |
2017-06-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | Rock heterogeneity plays an important role in solute spreading and mixing in hydrogeologic systems. Few observations, however, have been made that can spatially resolve these processes in 3-D, in consolidated rocks. We make observations of the spatially resolved steady state concentration of a sodium iodide solute while flowing brine through cylindrical rock cores using X-ray CT imaging. Three rocks with an increasing level of heterogeneity are chosen: a Berea sandstone, a Ketton carbonate, and an Indiana carbonate. The impact of heterogeneity on solute transport is analyzed by: (1) quantifying spreading and mixing using metrics such as the transverse dispersion coefficient, the dilution index, the reactor ratio, and the scalar dissipation rate and (2) visualizing and analyzing flow structures such as meandering, flow-focusing, and flow-splitting using isoconcentration contour maps. The transverse dispersion coefficient, D-t, and the variation in Dt throughout the rock core, increases with Peclet number (Pe) and rock heterogeneity. The reactor ratio indicates that mixing is Fickian for the Berea sandstone and Ketton carbonate, but diverges for the Indiana carbonate. The temporal evolution of the scalar dissipation rate, a measure of the mixing rate, remains close to that of Fickian mixing for the Berea and Ketton rocks but not for the Indiana. Heterogeneous rock features are observed to cause meandering, focusing, or splitting of the plume depending on Pe. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000405997000008 |
WOS关键词 | TRANSVERSE DISPERSION COEFFICIENTS ; POROUS-MEDIA ; REACTIVE TRANSPORT ; LATERAL DISPERSION ; SCALAR DISSIPATION ; PACKED-BEDS ; DILUTION ; FLOW ; MODEL ; ENHANCEMENT |
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/21956 |
专题 | 资源环境科学 |
作者单位 | 1.Imperial Coll London, Dept Earth Sci & Engn, South Kensington Campus, London, England; 2.Imperial Coll London, Qatar Carbonates & Carbon Storage Res Ctr, London, England |
推荐引用方式 GB/T 7714 | Boon, Maartje,Bijeljic, Branko,Krevor, Samuel. Observations of the impact of rock heterogeneity on solute spreading and mixing[J]. WATER RESOURCES RESEARCH,2017,53(6). |
APA | Boon, Maartje,Bijeljic, Branko,&Krevor, Samuel.(2017).Observations of the impact of rock heterogeneity on solute spreading and mixing.WATER RESOURCES RESEARCH,53(6). |
MLA | Boon, Maartje,et al."Observations of the impact of rock heterogeneity on solute spreading and mixing".WATER RESOURCES RESEARCH 53.6(2017). |
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