MOLECULAR DYNAMICS SIMULATIONS OF GRANULAR MATERIALS

Hans J. Herrmann
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Hans J. Herrmann: Höchstleistungsrechenzentrum, KFA, D-5170 Jülich, Germany

International Journal of Modern Physics C (IJMPC), 1993, vol. 04, issue 02, 309-316

Abstract: When sand or other granular materials are shaken, poured or sheared many intriguing phenomena can be observed. We will model the granular medium by a packing of elastic spheres and simulate it via Molecular Dynamics. Dissipation of energy and shear friction at collisions are included. The onset of fluidization can be determined and is in good agreement with experiments. On a vibrating plate we observe the formation of convection cells due to walls or amplitude modulations. Density and velocity profiles on conveyor belts are measured and the influence of an obstacle discussed. We mention various types of rheology for flow down an inclined chute or through a pipe and outflowing containers.

Date: 1993
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DOI: 10.1142/S012918319300032X

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