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Título: | Flow intermittency, dispersion, and correlated continuous time random walks in porous media |
Autor: | De Anna, Pietro; Le Borgne, Tanguy; Dentz, Marco CSIC ORCID ; Tartakovsky, Alexandre M.; Bolster, Diogo; Davy, Philippe | Fecha de publicación: | 1-may-2013 | Editor: | American Physical Society | Citación: | Physical Review Letters 110: 184502 (2013) | Resumen: | We study the intermittency of fluid velocities in porous media and its relation to anomalous dispersion. Lagrangian velocities measured at equidistant points along streamlines are shown to form a spatial Markov process. As a consequence of this remarkable property, the dispersion of fluid particles can be described by a continuous time random walk with correlated temporal increments. This new dynamical picture of intermittency provides a direct link between the microscale flow, its intermittent properties, and non-Fickian dispersion. © 2013 American Physical Society. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.110.184502 | URI: | http://hdl.handle.net/10261/93041 | DOI: | 10.1103/PhysRevLett.110.184502 | Identificadores: | doi: 10.1103/PhysRevLett.110.184502 issn: 0031-9007 e-issn: 1079-7114 |
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flow_intermittency_Anna.pdf | 940,26 kB | Adobe PDF | Visualizar/Abrir |
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