The understanding of the dense granular flow regime (intermediate between quasi-static and collisional regimes) has recently progressed significantly. We shall review the results concerning the friction law, which we have obtained with the help of discrete numerical simulations of flow of assemblies
Dense flows of dry granular material
✍ Scribed by Olivier Pouliquen; François Chevoir
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 157 KB
- Volume
- 3
- Category
- Article
- ISSN
- 1631-0705
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✦ Synopsis
The behavior of dense assemblies of dry grains submitted to continuous shear deformation is still not well understood. Recently it has been the subject of several experiments and discrete particle simulations. For both confined and free surface geometries, we present the general features of such flows as well as grain-level information. We then describe the main rheological models and their predictions. To cite this article: O. Pouliquen, F. Chevoir, C. R. Physique 3 (2002) 163-175. 2002 Académie des sciences/Éditions scientifiques et médicales Elsevier SAS granular media / hydrodynamics / rheology Écoulements de milieux granulaires secs Résumé Le comportement d'assemblées denses de grains secs soumises à un cisaillement rapide est encore mal compris, et a fait récemment l'objet de nombreuses études expérimentales et de simulations numériques discrètes. Nous présentons les caractéristiques générales de tels écoulements tant à surface libre que confinés, ainsi que les information obtenues à l'échelle du réseau de contact. Nous décrivons ensuite les principaux modèles rhéologiques, ainsi que leurs prédictions. Pour citer cet article : O. Pouliquen, F. Chevoir, C. R. Physique 3 (2002) 163-175. 2002 Académie des sciences/Éditions scientifiques et médicales Elsevier SAS milieux granulaires / hydrodynamique / rhologie
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