ESPCI web site
PMMH’s weekly seminar is held every Friday at 11 am (map)
Stéphane Perrard
Etienne Reyssat
Virgile Thiévenaz
PMMH
BARRE CASSAN
BAT A 1ER ETAGE CASE 18
7 QUAI SAINT BERNARD
75005 PARIS
France
Tel : (33) 1 40 79 45 22
Séminaire PMMH - Francisco Goio Castro (IPPT, Graz, Austria)
A Smoothed Particle Hydrodynamics Approach to Deformable Granular Materials
The phenomenology of granular materials results from a complex interplay between various properties of their constituent elements. Shape, friction, size distribution and softness can all significantly affect the rheology of granular materials, and disentangling the individual contributions of these properties is often challenging. For this reason, the impact of particle deformability is not well understood.
To address this issue, we use a novel numerical approach that combines Smoothed Particle Hydrodynamics (SPH) and Discrete Element Method (DEM) to explicitly simulate deformations at the grain level. The focus of this talk will be on the influence of particle deformability on a 2D silo discharge setup, illustrating a dual effect on both the spatial organization and the velocity distribution of the particles. Finally, we investigate the influence of deformability on the flow rate, which is well described by the Hagen-Beverloo equation independent of softness. Most interestingly, we elucidate the evolution of a heuristic parameter in the Hagen-Beverloo equation as a function of the ratio of pressure to bulk modulus. As a result, we propose an extended form of this equation that predicts flow rate while accounting for particle deformation.
The audience is composed of people with rather heterogeneous backgrounds including specialists in solids, fluids, granular flows, statistical physics... so the idea is to keep your talk understandable by people not necessarily working in your field... The seminar time slot runs from 11am to noon so the best is to make the talk last around 45 minutes to leave some time for discussion.
- Séminaires ESPCI-ENS de biophysique
- Séminaires du Département de Physique de l’ENS
- Séminaires du Laboratoire d’Hydrodynamique de l’X
- Séminaire de Mécanique d’Orsay (page web FAST)
- Séminaire de Mécanique d’Orsay (page web LIMSI)
- Séminaire de Mécanique des Fluides de l’Institut Jean le Rond d’Alembert
- Séminaires du laboratoire MSC, Paris VII
- Séminaires Gulliver
Link to cofee seminar (internal, every Thursday)
