| 项目编号: | 1417005
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| 项目名称: | Collaborative Research: Coupled Numerical and Laboratory Investigations of Chaotic Advection to Enhance Spreading and Reaction in Three-Dimensional, Heterogeneous Porous Media |
| 作者: | David Mays
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| 承担单位: | University of Colorado at Denver-Downtown Campus
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| 批准年: | 2013
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| 开始日期: | 2014-08-01
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| 结束日期: | 2018-07-31
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| 资助金额: | USD90626
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Earth Sciences
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| 英文关键词: | active spreading
; chaotic advection
; spreading
; chemical solution
; passive spreading
; laboratory experiment
; porous material
; porous geological material
; additional spreading
; groundwater
; passive
; heterogeneity
; remediation method
; porous media
; new laboratory technique
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| 英文摘要: | 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. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/96088
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
David Mays. Collaborative Research: Coupled Numerical and Laboratory Investigations of Chaotic Advection to Enhance Spreading and Reaction in Three-Dimensional, Heterogeneous Porous Media. 2013-01-01.
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