Affiliation

Fraunhofer IWM, Freiburg, Germany

Main category

Natural Sciences (Physics)

Caption

In a Discrete Element Method (DEM) simulation angles of repose are analyzed which reveal static properties of a granular material. The theoretical maximum angle is related to the internal angle of friction of the material, $\phi = \arctan(T/N)$, where $T$ is the maximum shear force the powder bulk can withstand when applying a normal force $N$. Two angles of repose, namely the outflow angle $\theta_{\text{O}}$ obtained by heap decomposition through slow outflow and the heap angle $\theta_{\text{H}}$ obtained by heap composition via pouring grains on top of a newly forming heap are measured. The simulation was carried out using SimPARTIX.

Link this video

https://science-media.org/video/22