Inertial Effects on Flow and Transport in Heterogeneous Porous Media
| Autor: | Alon Nissan, Brian Berkowitz |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
010504 meteorology & atmospheric sciences Advection General Physics and Astronomy Reynolds number Mechanics Kinetic energy 01 natural sciences Homogenization (chemistry) Physics::Fluid Dynamics Nonlinear system symbols.namesake 0103 physical sciences Fluid dynamics symbols 010306 general physics Continuous-time random walk Porous medium 0105 earth and related environmental sciences |
| Zdroj: | Physical Review Letters. 120 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.120.054504 |
| Popis: | We investigate the effects of high fluid velocities on flow and tracer transport in heterogeneous porous media. We simulate fluid flow and advective transport through two-dimensional pore-scale matrices with varying structural complexity. As the Reynolds number increases, the flow regime transitions from linear to nonlinear; this behavior is controlled by the medium structure, where higher complexity amplifies inertial effects. The result is, nonintuitively, increased homogenization of the flow field, which leads in the context of conservative chemical transport to less anomalous behavior. We quantify the transport patterns via a continuous time random walk, using the spatial distribution of the kinetic energy within the fluid as a characteristic measure. |
| Databáze: | OpenAIRE |
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