3D Pore-Scale Mixing Interface Evolution
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Acceso en línea: | |
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| _version_ | 1866910847039700992 |
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| author | Hallack, Daniel M C Sole-Mari, Guillem Farhat, Saif Bolster, Diogo |
| author_facet | Hallack, Daniel M C Sole-Mari, Guillem Farhat, Saif Bolster, Diogo |
| contents | The effective mixing behavior of solutes in porous media is fundamentally connected to the development of a local mixing interface between the two initial solutions, which is characterized by a complex lamellar structure. The deformation of the interface is controlled by the interplay of advection and diffusion, which generate the mechanisms of lamella stretching and shrinking, respectively. Based on the results of pore-scale numerical simulations, we develop a mechanistic single parabolic lamella model (SPLM) to capture the interface evolution across various temporal and Péclet number scales. The model shows near-perfect agreement with a 2D parallel plates scenario and promising results for a 3D porous medium. The SPLM model also establishes Péclet regimes for the equilibrium area and temporal regimes for the transient behavior of the interface. These findings represent a step forward towards eventually incorporating mixing limitation into general macroscopic reactive transport models. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_23539 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | 3D Pore-Scale Mixing Interface Evolution Hallack, Daniel M C Sole-Mari, Guillem Farhat, Saif Bolster, Diogo Fluid Dynamics The effective mixing behavior of solutes in porous media is fundamentally connected to the development of a local mixing interface between the two initial solutions, which is characterized by a complex lamellar structure. The deformation of the interface is controlled by the interplay of advection and diffusion, which generate the mechanisms of lamella stretching and shrinking, respectively. Based on the results of pore-scale numerical simulations, we develop a mechanistic single parabolic lamella model (SPLM) to capture the interface evolution across various temporal and Péclet number scales. The model shows near-perfect agreement with a 2D parallel plates scenario and promising results for a 3D porous medium. The SPLM model also establishes Péclet regimes for the equilibrium area and temporal regimes for the transient behavior of the interface. These findings represent a step forward towards eventually incorporating mixing limitation into general macroscopic reactive transport models. |
| title | 3D Pore-Scale Mixing Interface Evolution |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2410.23539 |