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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The packing and flow of aspherical frictional particles are studied usingdiscrete element simulations. Particles are superballs with shape$|x|^{s}+|y|^{s}+|z|^{s} = 1$ that varies from sphere ($s=2$) to cube($s=\infty$), constructed with an overlapping-sphere model. Both packingfraction, $\phi$, and coordination number, $z$, decrease monotonically withmicroscopic friction $\mu$, for all shapes. However, this decrease is moredramatic for larger $s$ due to a reduction in the fraction of face-facecontacts with increasing friction. For flowing grains, the dynamic friction$\tilde{\mu}$ - the ratio of shear to normal stresses - depends on shape,microscopic friction and inertial number $I.$ For all shapes, $\tilde{\mu}$grows from its quasi-static value $\tilde{\mu}_0$ as$(\tilde{\mu}-\tilde{\mu}_0) = dI^\alpha,$ with different universal behaviorfor frictional and frictionless shapes. For frictionless shapes the exponent$\alpha \approx 0.5$ and prefactor $d \approx 5\tilde{\mu}_0$ while forfrictional shapes $\alpha \approx 1$ and $d$ varies only slightly. The resultshighlight that the flow exponents are universal and are consistent for all theshapes simulated here.

Effect of Shape and Friction on the Packing and Flow of Granular Materials