Impact of normal stress-induced closure on laboratory-scale solute transport in a natural rock fracture
The impact of normal stress-induced closure on fluid flow and solute transport in a single rock fracture is demonstrated in this study. The fracture is created from a measured surface of a granite rock sample. The Bandis model is used to calculate the fracture closure due to normal stress, and the f...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2020-08-01
|
| Series: | Journal of Rock Mechanics and Geotechnical Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674775520300391 |
| _version_ | 1818690461286531072 |
|---|---|
| author | Liangchao Zou Vladimir Cvetkovic |
| author_facet | Liangchao Zou Vladimir Cvetkovic |
| author_sort | Liangchao Zou |
| collection | DOAJ |
| description | The impact of normal stress-induced closure on fluid flow and solute transport in a single rock fracture is demonstrated in this study. The fracture is created from a measured surface of a granite rock sample. The Bandis model is used to calculate the fracture closure due to normal stress, and the fluid flow is simulated by solving the Reynold equation. The Lagrangian particle tracking method is applied to modeling the advective transport in the fracture. The results show that the normal stress significantly affects fluid flow and solute transport in rock fractures. It causes fracture closure and creates asperity contact areas, which significantly reduces the effective hydraulic aperture and enhances flow channeling. Consequently, the reduced aperture and enhanced channeling affect travel time distributions. In particular, the enhanced channeling results in enhanced first arriving and tailing behaviors for solute transport. The fracture normal stiffness correlates linearly with the 5th and 95th percentiles of the normalized travel time. The finding from this study may help to better understand the stress-dependent solute transport processes in natural rock fractures. |
| first_indexed | 2024-12-17T12:26:22Z |
| format | Article |
| id | doaj.art-3c692f0560b54d0488bff45b1e067a15 |
| institution | Directory Open Access Journal |
| issn | 1674-7755 |
| language | English |
| last_indexed | 2024-12-17T12:26:22Z |
| publishDate | 2020-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Rock Mechanics and Geotechnical Engineering |
| spelling | doaj.art-3c692f0560b54d0488bff45b1e067a152022-12-21T21:48:44ZengElsevierJournal of Rock Mechanics and Geotechnical Engineering1674-77552020-08-01124732741Impact of normal stress-induced closure on laboratory-scale solute transport in a natural rock fractureLiangchao Zou0Vladimir Cvetkovic1Division of Resources, Energy and Infrastructure, Department of Sustainable Development, Environmental Science and Engineering, Royal Institute of Technology, Stockholm, 10044, Sweden; Department of Physical Geography, Stockholm University, Stockholm, 10691, Sweden; Corresponding author.Division of Resources, Energy and Infrastructure, Department of Sustainable Development, Environmental Science and Engineering, Royal Institute of Technology, Stockholm, 10044, SwedenThe impact of normal stress-induced closure on fluid flow and solute transport in a single rock fracture is demonstrated in this study. The fracture is created from a measured surface of a granite rock sample. The Bandis model is used to calculate the fracture closure due to normal stress, and the fluid flow is simulated by solving the Reynold equation. The Lagrangian particle tracking method is applied to modeling the advective transport in the fracture. The results show that the normal stress significantly affects fluid flow and solute transport in rock fractures. It causes fracture closure and creates asperity contact areas, which significantly reduces the effective hydraulic aperture and enhances flow channeling. Consequently, the reduced aperture and enhanced channeling affect travel time distributions. In particular, the enhanced channeling results in enhanced first arriving and tailing behaviors for solute transport. The fracture normal stiffness correlates linearly with the 5th and 95th percentiles of the normalized travel time. The finding from this study may help to better understand the stress-dependent solute transport processes in natural rock fractures.http://www.sciencedirect.com/science/article/pii/S1674775520300391Normal stressFluid flowSolute transportStiffnessParticle tracking |
| spellingShingle | Liangchao Zou Vladimir Cvetkovic Impact of normal stress-induced closure on laboratory-scale solute transport in a natural rock fracture Journal of Rock Mechanics and Geotechnical Engineering Normal stress Fluid flow Solute transport Stiffness Particle tracking |
| title | Impact of normal stress-induced closure on laboratory-scale solute transport in a natural rock fracture |
| title_full | Impact of normal stress-induced closure on laboratory-scale solute transport in a natural rock fracture |
| title_fullStr | Impact of normal stress-induced closure on laboratory-scale solute transport in a natural rock fracture |
| title_full_unstemmed | Impact of normal stress-induced closure on laboratory-scale solute transport in a natural rock fracture |
| title_short | Impact of normal stress-induced closure on laboratory-scale solute transport in a natural rock fracture |
| title_sort | impact of normal stress induced closure on laboratory scale solute transport in a natural rock fracture |
| topic | Normal stress Fluid flow Solute transport Stiffness Particle tracking |
| url | http://www.sciencedirect.com/science/article/pii/S1674775520300391 |
| work_keys_str_mv | AT liangchaozou impactofnormalstressinducedclosureonlaboratoryscalesolutetransportinanaturalrockfracture AT vladimircvetkovic impactofnormalstressinducedclosureonlaboratoryscalesolutetransportinanaturalrockfracture |