Collaborative Research: Coupled Flow Phenomena in Unsaturated Clay Barriers

合作研究：不饱和粘土屏障中的耦合流动现象

• 批准号: 0926276
• 负责人: Ning Lu
• 金额: $ 21.17万
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-15 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0926276&HistoricalAwards=false
• 关键词: Collaborative; Research; Coupled; Flow; Phenomena

This project seeks to advance the state of the art as it relates to modeling and evaluating coupled unsaturated flow in waste containment systems. Such systems are vital to securing nuclear, hazardous and municipal waste throughout the country. If successful, the new models will address behavior that is currently unaccounted for and approximated with physically inaccurate simplifications. The collaboration strategically leverages the strengths at each institution to address experimental and theoretical objectives.The goal of this research is to evaluate the existence and significance of chemico-osmosis and membrane behavior in unsaturated clays. A collaborative experimental and theoretical approach will be employed to achieve this goal. The overall objectives are: (1) to develop and evaluate an innovative apparatus for measuring membrane behavior and quantifying coupled fluid and chemical transport in unsaturated clays; (2) to clarify the direct and coupled driving forces governing fluid and chemical fluxes; (3) to measure governing parameters on unsaturated soils under conditions representing practical problems; (4) to develop a model for solute transport under unsaturated conditions that incorporates membrane behavior, and (5) to quantify the importance of coupling as a function of the degree of saturation and solute concentration in soils typical of barrier materials.

该项目旨在推进与废物遏制系统中的耦合不饱和流建模和评估相关的最新技术。此类系统对于确保全国范围内的核废物、危险废物和城市废物的安全至关重要。 如果成功，新模型将解决目前未解释的行为以及通过物理上不准确的简化进行近似的行为。此次合作战略性地利用每个机构的优势来解决实验和理论目标。这项研究的目标是评估不饱和粘土中化学渗透和膜行为的存在和意义。将采用协作实验和理论方法来实现这一目标。总体目标是：（1）开发和评估一种创新装置，用于测量膜行为并量化不饱和粘土中耦合流体和化学物质的传输； (2) 阐明控制流体和化学通量的直接驱动力和耦合驱动力； (3) 在代表实际问题的条件下测量非饱和土的控制参数； (4) 开发一个包含膜行为的不饱和条件下的溶质传输模型，(5) 量化耦合的重要性，作为屏障材料典型土壤中饱和度和溶质浓度的函数。