Abstract
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.
Highlights
Pietro de Anna, Tanguy Le Borgne, Marco Dentz, Alexandre M
We study the intermittency of fluid velocities in porous media and its relation to anomalous dispersion
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
Summary
Pietro de Anna, Tanguy Le Borgne, Marco Dentz, Alexandre M. Flow Intermittency, Dispersion and Correlated Continuous Time Random Walks in Porous Media We study the intermittency of fluid velocities in porous media and its relation to anomalous dispersion. 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.
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