Comparison of simulation and experimental results of a simplified jenike shear tester

Description

The simulation of very dense particle regimes such as moving or fluidized beds requires a well determined coefficient of friction, which characterizes the inter-particle friction force. Starting from rough guide values available in the literature, we determine the exact parameters by fitting numerical simulations to experimental measurements of a simplified Jenike shear tester. The open-source, discrete-element-method code LIGGGHTS is capable to model com- plex geometries built of triangulated meshes. In addition to preloading the bulk solid in the shear cell by a required constant principal stress, a new wall type is enhanced by a controller prescribing the wall motion. A comprehensive sensitivity study shows that the results are nearly insensitive to the spa- tial dimensions of the shear tester as well as all other material parameters. Therefore, this set-up is applicable to determine the coefficient of friction. Finally, we calculate the coefficient of friction of glass beads showing very good agree- ment with literature data and in-house experiments. Hence, this procedure can be used to deduce material parameters for the numerical simulation of dense granular flows.

Period	05 Aug 2013
Event title	6th International Conference on Discrete Element Methods (DEM6)
Event type	Conference
Location	United StatesShow on map