Diffusion in the presence of high-diffusivity paths is an important issue of current technology. In metals high-diffusivity paths are identified with dislocations, grain boundaries, free surfaces and internal microcracks. In porous media such as rocks, fissures provide a system of high-flow paths. R
A random walk model of dispersion in the diabatic surface layer
β Scribed by Anne J. Ley; D. J. Thomson
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- English
- Weight
- 780 KB
- Volume
- 109
- Category
- Article
- ISSN
- 0035-9009
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
A model for the parameter c involved in Packwood and BrownΓs expression for the ionization depth distribution /(qz) in EPMA is developed. Assuming that the electrons perform a random walk within the sample, the parameter c is related to the probability of Γnding an electron in the surface layer afte
## Abstract Of all the models of turbulent motion that are based on a randomβwalk technique, the simplest are ones which simulate individual particle trajectories. The accuracies of two such models are assessed by applying them to lowβlevel diffusion in the atmosphere. It is found that one based on
Following pulsed irradiation of disordered solids, optical absorption of trapped electrons decays in the far red and increases in the visible. The random-walk model of Scher and Control, quantitatively apphcable to electron mobility by timeof-flight, supports hopping to successively deeper traps. Ba
The motion of swimming micro-organisms that have a preferred direction of travel, such as single-celled algae moving upwards (gravitaxis) or towards a light source (phototaxis), is modelled as the continuous limit of a correlated and biased random walk as the time step tends to zero. This model lead