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标题：COMPUTATIONAL METHODOLOGY TO ANALYZE THE EFFECTOF MASS TRANSFER RATE ON ATTENUATION OF LEAKEDCARBON DIOXIDE IN SHALLOW AQUIFERS
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作者：Radek Fučík ; Jakub Solovský ; Michelle R. Plampin 等
期刊名称：Acta Polytechnica
印刷版ISSN：1210-2709
电子版ISSN：1805-2363
出版年度：2021
卷号：61
期号：SI
页码：77-88
DOI：10.14311/AP.2021.61.0077
语种：English
出版社：Czech Technical University in Prague
摘要：Exsolution and re-dissolution of CO2 gas within heterogeneous porous media areinvestigated using experimental data and mathematical modeling. In a set of bench-scale experiments,water saturated with CO2 under a given pressure is injected into a 2-D water-saturated porous mediasystem, causing CO2 gas to exsolve and migrate upwards. A layer of fine sand mimicking a heterogeneitywithin a shallow aquifer is present in the tank to study accumulation and trapping of exsolved CO2.Then, clean water is injected into the system and the accumulated CO2 dissolves back into the flowingwater. Simulated exsolution and dissolution mass transfer processes are studied using both nearequilibrium and kinetic approaches and compared to experimental data under conditions that do anddo not include lateral background water flow. The mathematical model is based on the mixed hybridfinite element method that allows for accurate simulation of both advection- and diffusion-dominatedprocesses.
关键词：Compositional flow;two–phase flow;kinetic mass transfer;gas exsolution;gas dissolution