Comparison of ring shear cell simulations in 2d/3d with experiments

Stefan Luding*

*Corresponding author for this work

Research output: Contribution to conferencePaper

Abstract

We present experiments together with corresponding molecular dynamics (MD) simulations of a two-dimensional (2D) and a three-dimensional (3D) granular material in Couette shear cells undergoing slow shearing. In 2D, the grains are disks confined between an inner, rotating wheel and a fixed outer ring. In 3D, the particles are disks, and a part of the bottom is rotating with the inner ring. The simulation results are compared to experimental studies and quantitative agreement is found within about 80-90 per-cent. Tracking the positions and orientations of individual particles allows us to obtain also density distributions, velocity - and rotation-rates in the system. The key issue is to show in how far quantitative agreement between an experiment and MD simulations is possible, besides the fact that many differences in model-details and the experiment exist. We discuss the quantitative agreement/disagreement, give possible reasons, and outline further research perspectives. Especially the issue of a micro-macro transition will be detailed: Stress, strain, and other continuum quantities can be obtained from the microscopic simulations, showing that the granular material is compressive, anisotropic and micro-polar - all at the same time.

Original languageEnglish
Publication statusPublished - 2006
Externally publishedYes
Event5th World Congress on Particle Technology, WCPT 2006: AIChE Spring Meeting and Global Congress on Process Safety - Orlando, United States
Duration: 23 Apr 200627 Apr 2006
Conference number: 5

Conference

Conference5th World Congress on Particle Technology, WCPT 2006
Abbreviated titleWCPT 2006
CountryUnited States
CityOrlando
Period23/04/0627/04/06

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    Luding, S. (2006). Comparison of ring shear cell simulations in 2d/3d with experiments. Paper presented at 5th World Congress on Particle Technology, WCPT 2006, Orlando, United States.