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DOI | 10.1029/2019WR025585 |
Reactive Transport in Heterogeneous Porous Media Under Different Peclet Numbers | |
Nissan, Alon; Berkowitz, Brian | |
2019-12-03 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:12页码:10119-10129 |
文章类型 | Article |
语种 | 英语 |
国家 | Israel |
英文摘要 | We study the synergistic effects of the Peclet number and the length scale of medium heterogeneity on the evolution of bimolecular reactive transport between mobile and immobile species. We performed a suite of numerical simulations at the Darcy scale that quantify the instantaneous, irreversible bimolecular reaction A(aq)+B-s -> C-aq, under various transport conditions (Peclet numbers) and porous media configurations (correlation lengths). We find that the global reaction rate is sensitive to both the Peclet number and the correlation length. The total amount of product decreases with increasing Peclet number, while it increases with increasing correlation length. In addition, for all of these scenarios, the global reaction rate is shown to be time dependent and is an outcome of the anomalous transport behavior of the chemical species. The time-dependent behavior of the reaction rate is amplified with increasing Peclet number and decreasing correlation length and can be well approximated by a power law relationship. We find, too, that the transport behavior of the reaction products (C) often deviates from that of the inflowing reactant species (A), because reactions occur preferentially within the flow domain. Finally, and due to the influence of the Peclet number on reactive transport, we show that temporal variations in the magnitude of the flow field (i.e, changing the Peclet number over time) shift the reaction and transport behavior into a state measurably different than that for steady flow conditions. |
英文关键词 | reactive transport heterogeneity Peclet number |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000500180100001 |
WOS关键词 | ANOMALOUS CHEMICAL-TRANSPORT ; MINERAL DISSOLUTION ; SPATIAL MOMENTS ; PORE ; FIELD ; DISPERSION ; SIMULATION ; IMPACT ; RATES ; FLOW |
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/223951 |
专题 | 资源环境科学 |
作者单位 | Weizmann Inst Sci, Dept Earth & Planetary Sci, Rehovot, Israel |
推荐引用方式 GB/T 7714 | Nissan, Alon,Berkowitz, Brian. Reactive Transport in Heterogeneous Porous Media Under Different Peclet Numbers[J]. WATER RESOURCES RESEARCH,2019,55(12):10119-10129. |
APA | Nissan, Alon,&Berkowitz, Brian.(2019).Reactive Transport in Heterogeneous Porous Media Under Different Peclet Numbers.WATER RESOURCES RESEARCH,55(12),10119-10129. |
MLA | Nissan, Alon,et al."Reactive Transport in Heterogeneous Porous Media Under Different Peclet Numbers".WATER RESOURCES RESEARCH 55.12(2019):10119-10129. |
条目包含的文件 | 条目无相关文件。 |
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