| Автор | G. Debrégeas |
| Автор | C. Josserand |
| Дата выпуска | 2000-10-15 |
| dc.description | We propose a model to describe the quasistatic shearing of dry granular materials, which notably captures the differences in velocity profiles recently observed in 2 and 3D Couette flow experiments. In our scheme, the steady-state flow is due to the intermittent motion of clusters of particles moving together with the wall. The motion of a cluster is associated with the transient formation of a fracture inside the sheared pack. The model is based on the existence of a persistence length for the fractures, which imposes a self-similar structure on the clusters. Through a probabilistic approach, we can evaluate the rate of appearance of a cluster of a given size and obtain a prediction for the average velocity profiles. We also predict the existence of large stress fluctuations at the moving wall, whose characteristics are in good agreement with experimental data. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | 2000 EDP Sciences |
| Название | A self-similar model for shear flows in dense granular materials |
| Тип | lett |
| DOI | 10.1209/epl/i2000-00415-5 |
| Electronic ISSN | 1286-4854 |
| Print ISSN | 0295-5075 |
| Журнал | EPL (Europhysics Letters) |
| Том | 52 |
| Первая страница | 137 |
| Последняя страница | 143 |
| Аффилиация | G. Debrégeas; The James Franck Institute, The University of Chicago 5640 South Ellis Avenue, Chicago, IL 60637, USA |
| Аффилиация | C. Josserand; The James Franck Institute, The University of Chicago 5640 South Ellis Avenue, Chicago, IL 60637, USA |
| Выпуск | 2 |
