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Título: | Pore-Scale Mixing and the Evolution of Hydrodynamic Dispersion in Porous Media |
Autor: | Puyguiraud, Alexandre CSIC ORCID; Gouze, Philippe; Dentz, Marco CSIC ORCID | Palabras clave: | Interdisciplinary Physics Nonlinear dynamics Statistical Physics Condensed Matter & Materials Physics |
Fecha de publicación: | 19-abr-2021 | Editor: | American Physical Society | Citación: | Physical Review Letters 126 (16) (2021) | Resumen: | We study the interplay of pore-scale mixing and network-scale advection through heterogeneous porous media, and its role for the evolution and asymptotic behavior of hydrodynamic dispersion. In a Lagrangian framework, we identify three fundamental mechanisms of pore-scale mixing that determine large scale particle motion, namely, the smoothing of intrapore velocity contrasts, the increase of the tortuosity of particle paths, and the setting of a maximum time for particle transitions. Based on these mechanisms, we derive a theory that predicts anomalous and normal hydrodynamic dispersion in terms of the characteristic pore length, Eulerian velocity distribution, and Péclet number. | Versión del editor: | https://doi.org/10.1103/PhysRevLett.126.164501 | URI: | http://hdl.handle.net/10261/242467 | DOI: | 10.1103/PhysRevLett.126.164501 |
Aparece en las colecciones: | (IDAEA) Artículos |
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PhysRevLett.126.164501.pdf | Artículo principal | 629,98 kB | Adobe PDF | Visualizar/Abrir |
si_DispersionPeR.pdf | Material suplementario | 300,22 kB | Adobe PDF | Visualizar/Abrir |
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