English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We investigate the properties of self-diffusion in heterogeneous densegranular flows involving a gradient of stress and inertial number. The study isbased on simulated plane shear with gravity and Poiseuille flows, in whichnon-local effects induce some creep flow in zones where stresses are below theyield. Results show that shear-induced diffusion is qualitatively different inzones above and below the yield. Below the yield, diffusivity is no longergoverned by velocity fluctuations, and we evidenced a direct scaling betweendiffusivity and local shear rate. This is interpreted by analysing the graintrajectories, which exhibit a caging dynamics developing in zones below theyield. We finally introduce an explicit scaling for the profile of localinertial number in these zones, which leads to a straightforward expression ofthe diffusivity as a function of the stress and position in non-local flows.

Shear-induced diffusion in non-local granular flows