ERI: Impact of pore-scale heterogeneity on precipitation and transport in porous media

ERI：孔隙尺度非均质性对多孔介质中降水和传输的影响

• 批准号: 2301243
• 负责人: Shima Parsa
• 金额: $ 20万
• 依托单位: Rochester Institute of Tech
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-06-01 至 2025-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2301243&HistoricalAwards=false
• 关键词: ERI; Impact; pore; scale; heterogeneity

The precipitation of solutes in porous structures and subsurface systems can cause a cascade of unexpected issues, including clogging of pores, as in the salt precipitation upon injection of CO2 in a brine aquifer. This award aims to investigate the precipitation of water-soluble polymers in porous media and the impact of medium heterogeneity on precipitation and transport across the medium. Soft lithography will be used to fabricate two-dimensional porous environments with different heterogeneities. Using optical microscopy, the changes in network structure and flow distribution will be monitored upon injection of antisolvent to precipitate the polymer. These studies will reveal how precipitation and clogging regulate the flow distribution in the network of connected pores. The broader impacts of this award include training graduate students and undergraduates to study these timely problems and to develop a quantitative understanding of transport in porous media. It will also enable new demonstrations to inspire and engage K-12 students in the Science lessons delivered at the local Boys and Girls Club.This award will develop new experimental techniques and improved mathematical models to generate a fundamental understanding of reactive transport in porous media. The goal is to investigate how medium heterogeneity and dynamic network changes due to precipitation impact long-term advection and reaction processes in porous media. The following systematic aims are considered: 1) the study of the role of local medium heterogeneity in the transition between advection-dominated and reaction-dominated regimes, and 2) the self-limiting transport of solute due to precipitation. The correlation between advection and precipitation rates with the time scale of the response of the system to local changes will be used to predict clogging due to reactive transport. The results will provide foundational models of reactive transport based on bulk transport properties accessible in industrial operations to maintain percolation and avoid clogging. More broadly, this award will advance the understanding of self-regulating growth at the interface of two miscible fluids in a confined and heterogeneous environment.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

多孔结构和地下系统中溶质的沉淀可能会导致一系列意想不到的问题，包括孔隙堵塞，就像在盐水含水层中注入二氧化碳时发生的盐沉淀一样。该奖项旨在研究多孔介质中水溶性聚合物的沉淀以及介质不均匀性对沉淀和跨介质传输的影响。软光刻将用于制造具有不同异质性的二维多孔环境。使用光学显微镜，在注入反溶剂以沉淀聚合物时监测网络结构和流量分布的变化。这些研究将揭示降水和堵塞如何调节连通孔隙网络中的流量分布。该奖项的更广泛影响包括培训研究生和本科生研究这些及时的问题并形成对多孔介质传输的定量理解。它还将实现新的演示，以激发和吸引 K-12 学生参与当地男孩和女孩俱乐部提供的科学课程。该奖项将开发新的实验技术和改进的数学模型，以形成对多孔介质中反应传输的基本理解。目标是研究降水导致的介质异质性和动态网络变化如何影响多孔介质中的长期平流和反应过程。考虑以下系统目标：1）研究局部介质非均质性在平流主导和反应主导状态之间的转变中的作用，2）由于降水而导致的溶质自限传输。平流和降水速率与系统对局部变化的响应时间尺度之间的相关性将用于预测由于反应性传输而导致的堵塞。研究结果将提供基于工业操作中可实现的散装运输特性的反应性运输的基础模型，以维持渗透并避免堵塞。更广泛地说，该奖项将增进对受限和异质环境中两种可混溶流体界面的自我调节生长的理解。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。