Abstract
Continuous time random walks model anomalous diffusion. Coupling allows the magnitude of particle jumps to depend on the waiting time between jumps. Governing equations for the long-time scaling limits of these models are found to have fractional powers of coupled space and time differential operators. Explicit solutions and scaling properties are presented for these equations, which can be used to model flow in porous media and other physical systems.
- Received 5 June 2002
DOI:https://doi.org/10.1103/PhysRevE.66.060102
©2002 American Physical Society