Related Experiment Video
Updated: Aug 7, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
S shape of a granular pile in a rotating drum
Nicolas Taberlet1, Patrick Richard, E John Hinch
1GMCM, Université Rennes 1, CNRS UMR 6626, Batiment 11A, 35042 Rennes, France.
Abstract:
The shape of a granular pile in a rotating drum is investigated. Using discrete elements method (DEM) simulations we show that the "S shape" obtained for high rotation speed can be accounted for by the friction on the end plates. A theoretical model which accounts for the effect of the end plates is presented and the equation of the shape of the free surface is derived. The model reveals a dimensionless number which quantifies the influence of the end plates on the shape of the pile. Finally, the scaling laws of the system are discussed and numerical results support our conclusions.
More Related Videos
09:00Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
Published on: September 29, 2019
05:40An Orbital Shaking Culture of Mammalian Cells in O-shaped Vessels to Produce Uniform Aggregates
Published on: January 7, 2019
Related Concept Videos
Shape and Texture of Coarse Aggregate
Deformation in a Circular Shaft
Rolling Without Slipping
Design Example: Aggregate Gradation
The grading, or particle-size distribution, of sand is determined using sieve analysis, with standard sizes ranging from 150 μm to 10 mm (ASTM No. 100 sieve to 3⁄8 in. sieve). Sand is sampled...
Sieve Analysis and Grading Curves
Plastic Deformation in Circular Shafts