...
首页> 外文期刊>Journal of Computational Physics >Dimensional effects of inter-phase mass transfer on attenuation of structurally trapped gaseous carbon dioxide in shallow aquifers
【24h】

Dimensional effects of inter-phase mass transfer on attenuation of structurally trapped gaseous carbon dioxide in shallow aquifers

机译:相相质量转移对浅层含水层在结构捕获的气态二氧化碳衰减的尺寸效应

获取原文
获取原文并翻译 | 示例
           

摘要

Based on experimental evidence and using mathematical modeling, inter-phase mass transfer processes of CO2 exsolving from and dissolving into water in heterogeneous porous media are investigated under two fundamentally different flow conditions: in a quasi one dimensional vertical column and in a two-dimensional tank with a lateral background water flow, both at laboratory scale. In both cases, the CO2 dissolved in water under a given overpressure is injected for a certain period at the bottom of the tank, exsolves, and migrates upwards. A layer of fine sand is present in the tanks designed to mimic geological scenarios of accumulation and trapping of exsolved CO2 in shallow aquifers. Then, clean water is injected and the accumulated CO2 is dissolved back into the flowing water. The study aims to point out the differences in the mass transfer processes between the quasi-1D and 2D cases using a mathematical model of two-phase compositional flow in heterogeneous porous media calibrated to the experimental datasets, and expose strategies that should be explored in future research. Additionally, temperature variations observed during the 2D experiments allow for analysis of isothermal versus non-isothermal effects on the processes of multiphase CO2 evolution. The mathematical model is discretized and solved using the mixed hybrid finite element method in 2D that allows for the simulation of both advection- and diffusion-dominated processes accurately. (C) 2019 Elsevier Inc. All rights reserved.
机译:基于实验证据和使用数学建模,在两个根本不同的流动条件下研究了在异构多孔介质中渗出并溶解在异质多孔介质中的CO 2的相互相同的传质方法:在准一维垂直柱和二维罐中在实验室规模的横向背景水流。在这两种情况下,在给定的超压下溶解在水中的二氧化碳在坦克,exsolves底部的一定时间内注射一定时间,并向上迁移。坦克中存在一层细砂,旨在模拟浅含水层中溢出的CO2的积累和捕获的地质场景。然后,将清洁水注入并将累积的CO 2溶解回流动水。该研究旨在指出使用两相成分流动在实验数据集的异质多孔介质中的两相成分流动的数学模型来指出拟ID和2D病例之间的差异。将来应探索的策略研究。另外,在2D实验期间观察到的温度变化允许分析对多相CO2进化过程的等温对非等温效应。在2D中使用混合混合有限元方法离散化并解决了数学模型,其允许精确地模拟平程和扩散主导的过程。 (c)2019 Elsevier Inc.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号