Granular flows from a continuum point of view
Event details
| Date | 18.02.2014 |
| Hour | 11:00 › 12:00 |
| Speaker | Pierre-Yves Lagrée - CNRS d'Alembert UPMC, Paris |
| Location | |
| Category | Conferences - Seminars |
Granular matter (sand, rocks, gravels...) flows like a viscous fluid or resists to shear stress like a solid. It evolves from one state to the other over a distance typically of a few grain diameters.
Here we adopt the fluid point of view and discribe granular matter as a continuum media with the so called µ(I) rheology: it is a plastic rheology were the normal and shear stress are proportional (Coulomb friction law).
This non newtonian rheology is implemented in a 2D Navier-Stokes solver (Gerris). Moreover, comparison with Contact Dynamics simulations (the displacement of all the grains is computed) and experiments show the reliability of the μ(I)-rheology when modeling complex flow of granular matter in cases of avalanche flows (Bagnold flow), collapse of columns and flow in hourglass.
Here we adopt the fluid point of view and discribe granular matter as a continuum media with the so called µ(I) rheology: it is a plastic rheology were the normal and shear stress are proportional (Coulomb friction law).
This non newtonian rheology is implemented in a 2D Navier-Stokes solver (Gerris). Moreover, comparison with Contact Dynamics simulations (the displacement of all the grains is computed) and experiments show the reliability of the μ(I)-rheology when modeling complex flow of granular matter in cases of avalanche flows (Bagnold flow), collapse of columns and flow in hourglass.
Practical information
- General public
- Free
Organizer
- IGM
Contact
- Géraldine Palaj