Anomalous Transport in Dissolving Porous Media: Transitions Between Fickian and Non‐Fickian Regimes
Abstract Mineral dissolution is a fundamental geologic process that alters pore structures, significantly impacting fluid flow and solute transport in porous media. Depending on the interplay between advection, diffusion, and reaction rates, mineral dissolution produces distinct dissolution patterns...
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| Format: | Article |
| Language: | English |
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Wiley
2025-08-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2025GL115940 |
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| author | Jingxuan Deng Rishabh P. Sharma Piotr Szymczak Peter K. Kang |
| author_facet | Jingxuan Deng Rishabh P. Sharma Piotr Szymczak Peter K. Kang |
| author_sort | Jingxuan Deng |
| collection | DOAJ |
| description | Abstract Mineral dissolution is a fundamental geologic process that alters pore structures, significantly impacting fluid flow and solute transport in porous media. Depending on the interplay between advection, diffusion, and reaction rates, mineral dissolution produces distinct dissolution patterns, such as wormholing and uniform dissolution. These structural changes directly influence the flow field, which in turn controls solute transport behavior. In this study, we conducted pore network modeling to investigate the effects of initial pore network heterogeneity and dissolution regimes on solute transport dynamics. Wormholing enhances network heterogeneity by creating preferential flow paths and stagnation zones, resulting in a transition from Fickian to non‐Fickian transport. In contrast, uniform dissolution homogenizes the pore network and the flow field, driving a transition from non‐Fickian to Fickian transport, even in networks with high initial heterogeneity. These transitions are governed by initial network heterogeneity and the Damköhler number. |
| format | Article |
| id | doaj-art-8de26b81b4ac4a61bea4aaa5caeadb79 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-8de26b81b4ac4a61bea4aaa5caeadb792025-08-20T03:41:54ZengWileyGeophysical Research Letters0094-82761944-80072025-08-015215n/an/a10.1029/2025GL115940Anomalous Transport in Dissolving Porous Media: Transitions Between Fickian and Non‐Fickian RegimesJingxuan Deng0Rishabh P. Sharma1Piotr Szymczak2Peter K. Kang3Department of Earth and Environmental Sciences University of Minnesota – Twin Cities Minneapolis MN USAInstitute of Theoretical Physics, Faculty of Physics, University of Warsaw Warsaw PolandInstitute of Theoretical Physics, Faculty of Physics, University of Warsaw Warsaw PolandDepartment of Earth and Environmental Sciences University of Minnesota – Twin Cities Minneapolis MN USAAbstract Mineral dissolution is a fundamental geologic process that alters pore structures, significantly impacting fluid flow and solute transport in porous media. Depending on the interplay between advection, diffusion, and reaction rates, mineral dissolution produces distinct dissolution patterns, such as wormholing and uniform dissolution. These structural changes directly influence the flow field, which in turn controls solute transport behavior. In this study, we conducted pore network modeling to investigate the effects of initial pore network heterogeneity and dissolution regimes on solute transport dynamics. Wormholing enhances network heterogeneity by creating preferential flow paths and stagnation zones, resulting in a transition from Fickian to non‐Fickian transport. In contrast, uniform dissolution homogenizes the pore network and the flow field, driving a transition from non‐Fickian to Fickian transport, even in networks with high initial heterogeneity. These transitions are governed by initial network heterogeneity and the Damköhler number.https://doi.org/10.1029/2025GL115940 |
| spellingShingle | Jingxuan Deng Rishabh P. Sharma Piotr Szymczak Peter K. Kang Anomalous Transport in Dissolving Porous Media: Transitions Between Fickian and Non‐Fickian Regimes Geophysical Research Letters |
| title | Anomalous Transport in Dissolving Porous Media: Transitions Between Fickian and Non‐Fickian Regimes |
| title_full | Anomalous Transport in Dissolving Porous Media: Transitions Between Fickian and Non‐Fickian Regimes |
| title_fullStr | Anomalous Transport in Dissolving Porous Media: Transitions Between Fickian and Non‐Fickian Regimes |
| title_full_unstemmed | Anomalous Transport in Dissolving Porous Media: Transitions Between Fickian and Non‐Fickian Regimes |
| title_short | Anomalous Transport in Dissolving Porous Media: Transitions Between Fickian and Non‐Fickian Regimes |
| title_sort | anomalous transport in dissolving porous media transitions between fickian and non fickian regimes |
| url | https://doi.org/10.1029/2025GL115940 |
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