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Farhang Radjai


Le 25 novembre 2021

A 2D sheared granular flow between two rough walls

Time and length scales in rheology of granular flows 

I present two series of particle dynamics simulations to investigate the intrinsic and emergent length and time scales in granular flows. Our simulation data suggest that the rheology is controlled by at least two emerging length scales depending on the inertial nature of the flow and the roughness of boundary elements. It is also found that all  characteristic times boil down to two time scales whose ratio controls the rheological behavior (effective friction and solid fraction). These results are relevant to the definition of the representative volume element and quasi-static conditions.    


Le 25 novembre 2021
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Bâtiment Galilée

Salle 011

Publié le 9 novembre 2021

Mis à jour le 9 novembre 2021