Flow Intermittency, Dispersion, and Correlated Continuous Time Random Walks in Porous Media
Journal Article
·
· Physical Review Letters, 110(18):Article No. 184502
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.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1177329
- Report Number(s):
- PNNL-SA-97279; 47585; KJ0401000
- Journal Information:
- Physical Review Letters, 110(18):Article No. 184502, Journal Name: Physical Review Letters, 110(18):Article No. 184502
- Country of Publication:
- United States
- Language:
- English
Similar Records
Pore-scale intermittent velocity structure underpinning anomalous transport through 3-D porous media
Two-particle description of turbulence, Markov property, and intermittency
Random walk particle tracking simulations of non-Fickian transport in heterogeneous media
Journal Article
·
Tue Aug 26 20:00:00 EDT 2014
· Geophysical Research Letters
·
OSTI ID:1557840
Two-particle description of turbulence, Markov property, and intermittency
Journal Article
·
Tue Jan 31 23:00:00 EST 1989
· Phys. Fluids A; (United States)
·
OSTI ID:6794806
Random walk particle tracking simulations of non-Fickian transport in heterogeneous media
Journal Article
·
Tue Jun 01 00:00:00 EDT 2010
· Journal of Computational Physics
·
OSTI ID:21333909