The Effects of Pore Geometry on Late Time Solute Transport with the Presence of Recirculation Zone
The solute transport process in porous media is central to understanding many geophysical processes and determines the success of engineered applications. However, fundamental understanding of solute transport in heterogeneous porous media remains challenging especially when inertial effects are sig...
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MDPI AG
2022-06-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/13/4636 |
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| author | Peijie Yang Guangwei Wu Sha Gu Qin Guan Lichun Wang |
| author_facet | Peijie Yang Guangwei Wu Sha Gu Qin Guan Lichun Wang |
| author_sort | Peijie Yang |
| collection | DOAJ |
| description | The solute transport process in porous media is central to understanding many geophysical processes and determines the success of engineered applications. However, fundamental understanding of solute transport in heterogeneous porous media remains challenging especially when inertial effects are significant. To address this challenge, we employed direct numerical simulations in a variety of intrapore geometries at a high Reynolds number (<i>Re</i> = 10) flow regime, where recirculation zones (RZs) are present with significant inertial effects. We find that the volume of RZs depends on pore geometries. Moreover, RZs serve as an immobile domain that can trap and release solutes that lead to non-Fickian transport, characterized by the early arrival and heavy tailing of breakthrough curves and bimodal residence time distributions (RTDs). Lastly, the late time portion of RTDs is fitted to the power law function with determined exponent <i>n</i>, where <i>n</i> depends on the pore geometries and consequently the volume of RZs. Our study sheds light on the mechanisms of an immobile zone on the solute transport, especially improving our understanding of late time transport tailing in pressurized heterogeneous porous media. |
| first_indexed | 2024-03-09T21:58:12Z |
| format | Article |
| id | doaj.art-f3971be39c0e43c482dc3bdd70fe1878 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T21:58:12Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
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| series | Energies |
| spelling | doaj.art-f3971be39c0e43c482dc3bdd70fe18782023-11-23T19:54:59ZengMDPI AGEnergies1996-10732022-06-011513463610.3390/en15134636The Effects of Pore Geometry on Late Time Solute Transport with the Presence of Recirculation ZonePeijie Yang0Guangwei Wu1Sha Gu2Qin Guan3Lichun Wang4Shandong Provincial Territorial Spatial Ecological Restoration Center, Jinan 250014, ChinaShandong Provincial Territorial Spatial Ecological Restoration Center, Jinan 250014, China801 Institute of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources, Jinan 250014, China801 Institute of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources, Jinan 250014, ChinaInstitute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, ChinaThe solute transport process in porous media is central to understanding many geophysical processes and determines the success of engineered applications. However, fundamental understanding of solute transport in heterogeneous porous media remains challenging especially when inertial effects are significant. To address this challenge, we employed direct numerical simulations in a variety of intrapore geometries at a high Reynolds number (<i>Re</i> = 10) flow regime, where recirculation zones (RZs) are present with significant inertial effects. We find that the volume of RZs depends on pore geometries. Moreover, RZs serve as an immobile domain that can trap and release solutes that lead to non-Fickian transport, characterized by the early arrival and heavy tailing of breakthrough curves and bimodal residence time distributions (RTDs). Lastly, the late time portion of RTDs is fitted to the power law function with determined exponent <i>n</i>, where <i>n</i> depends on the pore geometries and consequently the volume of RZs. Our study sheds light on the mechanisms of an immobile zone on the solute transport, especially improving our understanding of late time transport tailing in pressurized heterogeneous porous media.https://www.mdpi.com/1996-1073/15/13/4636solute transportnon-fickiantransport tailingrecirculation zoneporous media |
| spellingShingle | Peijie Yang Guangwei Wu Sha Gu Qin Guan Lichun Wang The Effects of Pore Geometry on Late Time Solute Transport with the Presence of Recirculation Zone Energies solute transport non-fickian transport tailing recirculation zone porous media |
| title | The Effects of Pore Geometry on Late Time Solute Transport with the Presence of Recirculation Zone |
| title_full | The Effects of Pore Geometry on Late Time Solute Transport with the Presence of Recirculation Zone |
| title_fullStr | The Effects of Pore Geometry on Late Time Solute Transport with the Presence of Recirculation Zone |
| title_full_unstemmed | The Effects of Pore Geometry on Late Time Solute Transport with the Presence of Recirculation Zone |
| title_short | The Effects of Pore Geometry on Late Time Solute Transport with the Presence of Recirculation Zone |
| title_sort | effects of pore geometry on late time solute transport with the presence of recirculation zone |
| topic | solute transport non-fickian transport tailing recirculation zone porous media |
| url | https://www.mdpi.com/1996-1073/15/13/4636 |
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