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Collaborative Research: Coupled Numerical and Laboratory Investigations of Chaotic Advection to Enhance Spreading and Reaction in Three-Dimensional, Heterogeneous Porous Media

合作研究：混沌平流耦合数值和实验室研究，以增强三维非均质多孔介质中的扩散和反应

基本信息

批准号：
1417017
负责人：
Roseanna Neupauer
金额：
$ 49.34万
依托单位：
University of Colorado at Boulder
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2014
资助国家：
美国
起止时间：
2014-08-01 至 2018-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1417017&HistoricalAwards=false
关键词：
Collaborative Research Coupled Numerical Laboratory

项目摘要

One method for remediating contaminated groundwater is to introduce a chemical solution that will react with and degrade the contaminant. This remediation method is most successful if the introduced chemical solution is spread throughout the contaminated area. The porous materials through which groundwater flows are naturally heterogeneous, meaning that water flows more easily through some parts and less easily through others. This heterogeneity naturally causes some spreading, called passive spreading, of the chemical solution into the contaminated groundwater. Additional spreading, called active spreading, can occur by inducing certain time-varying patterns of groundwater flow in the contaminated area. Certain time-varying flows, classified as chaotic advection, are known to substantially enhance active spreading. Both passive and active spreading lead to enhanced degradation of the contaminant; however, the combined effect of active and passive spreading is not well understood. In this project, a suite of laboratory experiments and numerical simulations will be used (1) to investigate the interplay between passive and active spreading and the role that each plays in enhancing degradation, and (2) to develop strategies for designing chaotic advection patterns for different patterns of heterogeneity. The laboratory experiments will be conducted using novel laser-based optical techniques to visualize and quantify the combined effects of passive and active spreading on contaminant degradation. Activities such as remediation of contaminated groundwater, extraction of geothermal energy, and certain types of mining of metals all rely on spreading of chemical solutions in porous geological materials. Because of the natural heterogeneity of geological materials, an understanding of the relationship between heterogeneity and chaotic advection and their effects on spreading is critical to the success of these applications. This project will also develop new laboratory techniques that could provide a breakthrough in measurement of reactive transport in porous media.

修复受污染地下水的一种方法是引入一种化学溶液，该溶液会与污染物发生反应并降解污染物。如果将引入的化学溶液散布到整个污染区域，则这种修复方法是最成功的。地下水流经的多孔材料自然是异质的，这意味着水更容易流过某些部分，而不太容易流过其他部分。这种异质性自然会导致化学溶液扩散到受污染的地下水中，称为被动扩散。额外的扩散，称为主动扩散，可以通过在污染区域诱导地下水流的某些随时间变化的模式来发生。某些时变流（被归类为混沌平流）已知可显着增强主动扩散。被动和主动传播都会导致污染物的增强降解；然而，主动传播和被动传播的综合效应尚不清楚。在该项目中，将使用一系列实验室实验和数值模拟（1）研究被动和主动扩散之间的相互作用以及每种扩散在促进退化中所发挥的作用，以及（2）制定针对不同异质性模式设计混沌平流模式的策略。实验室实验将使用新型激光光学技术进行，以可视化和量化被动和主动扩散对污染物降解的综合影响。修复受污染的地下水、提取地热能以及某些类型的金属开采等活动都依赖于化学溶液在多孔地质材料中的扩散。由于地质材料的自然非均质性，了解非均质性与混沌平流之间的关系及其对扩散的影响对于这些应用的成功至关重要。该项目还将开发新的实验室技术，为多孔介质中反应输运的测量提供突破。

项目成果

期刊论文数量（7）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Wall Effect Mitigation Techniques for Experiments with Planar Walls

平面墙实验的墙效应缓解技术

DOI：
10.1007/s11242-020-01399-9
发表时间：
2020
期刊：
Transport in Porous Media
影响因子：
2.7
作者：
Roth, Eric J.;Neupauer, Roseanna M.;Mays, David C.;Sather, Lauren J.;Crimaldi, John P.
通讯作者：
Crimaldi, John P.

Methods for Laser-Induced Fluorescence Imaging of Solute Plumes at the Darcy Scale in Quasi-Two-Dimensional, Refractive Index-Matched Porous Media

准二维折射率匹配多孔介质中达西尺度溶质羽流的激光诱导荧光成像方法

DOI：
10.1007/s11242-021-01545-x
发表时间：
2021
期刊：
Transport in Porous Media
影响因子：
2.7
作者：
Roth, Eric J.;Mays, David C.;Neupauer, Roseanna M.;Sather, Lauren J.;Crimaldi, John P.
通讯作者：
Crimaldi, John P.

Contributions of Pore‐Scale Mixing and Mechanical Dispersion to Reaction During Active Spreading by Radial Groundwater Flow

DOI：
10.1029/2019wr026276
发表时间：
2020-07
期刊：
Water Resources Research
影响因子：
5.4
作者：
R. Neupauer;L. J. Sather;D. Mays;J. Crimaldi;E. J. Roth
通讯作者：
R. Neupauer;L. J. Sather;D. Mays;J. Crimaldi;E. J. Roth

Experiments and Simulations on Plume Spreading by Engineered Injection and Extraction in Refractive Index Matched Porous Media

DOI：
10.1029/2022wr032943
发表时间：
2023-01
期刊：
Water Resources Research
影响因子：
5.4
作者：
L. J. Sather;E. J. Roth;R. Neupauer;J. Crimaldi;D. Mays
通讯作者：
L. J. Sather;E. J. Roth;R. Neupauer;J. Crimaldi;D. Mays

Demonstration of Reversible Dispersion in a Darcy-Scale Push-Pull Laboratory Experiment

达西级推拉实验室实验中可逆色散的演示

DOI：
10.1007/s11242-021-01682-3
发表时间：
2023
期刊：
Transport in Porous Media
影响因子：
2.7
作者：
Neupauer, Roseanna M.;Roth, Eric J.;Crimaldi, John P.;Mays, David C.;Sather, Lauren J.
通讯作者：
Sather, Lauren J.