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Effect of spatially correlated disorder on solute dispersion and mixing in partially saturated porous media
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Saeibehrouzi, Ali, Denissenko, Petr, Abolfathi, Soroush and Holtzman, Ran (2023) Effect of spatially correlated disorder on solute dispersion and mixing in partially saturated porous media. In: EGU General Assembly 2023, Vienna, Austria , 23–28 Apr 2023 doi:10.5194/egusphere-egu23-16609
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WRAP-effect-spatially-correlated-disorder-solute-dispersion-mixing-partially-saturated-porous-media-2023.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (288Kb) | Preview |
Official URL: https://doi.org/10.5194/egusphere-egu23-16609
Abstract
The transport of solute particles is common in many natural and engineering processes, such as nutrition/contamination transport in subsurface systems or underground carbon dioxide sequestration. While most of the available investigations concentrate on single-phase scenarios, more often, multiple fluids coexist, denoted frequently as unsaturated conditions. Here, and by means of direct numerical simulation, the effect of spatially correlated disorder in pore size is examined for two-phase displacement in viscous fingering regime. Following the stabilisation of fluids interface (steady-state condition), the solute solution is introduced into the invading phase with lower viscosity. Simulation results indicate that the spatial disorder impacts solute migration through the invading phase saturation and tortuosity of velocity streamlines. A bimodal variation can be seen from the histogram of probability of pore-scale Peclet number with zones being mostly dominated by either advection or diffusion. In addition, there exists a transition region with an interplay between both advective and diffusive mechanisms. The creation of trapped regions focuses the flow into preferential pathways, resulting in a higher dispersion coefficient. This, on the other side, forms a concentration gradient transverse to the direction of flow, directing solute solution through diffusivity from preferential pathways to low-velocity zones.
| Item Type: | Conference Item (Other) | ||||||
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| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
| Library of Congress Subject Headings (LCSH): | Transport theory, Fluid dynamics , Porous materials -- Transport properties, Porous materials -- Fluid dynamics | ||||||
| Official Date: | 2023 | ||||||
| Dates: |
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| DOI: | 10.5194/egusphere-egu23-16609 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||
| Date of first compliant deposit: | 6 April 2023 | ||||||
| Date of first compliant Open Access: | 12 April 2023 | ||||||
| Conference Paper Type: | Other | ||||||
| Title of Event: | EGU General Assembly 2023 | ||||||
| Type of Event: | Other | ||||||
| Location of Event: | Vienna, Austria | ||||||
| Date(s) of Event: | 23–28 Apr 2023 | ||||||
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