GENERATION OF HOMOGENEOUS GRANULAR PACKINGS: CONTACT DYNAMICS SIMULATIONS AT CONSTANT PRESSURE USING FULLY PERIODIC BOUNDARIES

M. Reza Shaebani (), Tamás Unger and János Kertész
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M. Reza Shaebani: Institute for Advanced Studies in Basic Sciences, Zanjan 45195-1159, Iran;
Tamás Unger: HAS-BME Condensed Matter Research Group, Budapest University of Technology and Economics, Budapest, Hungary
János Kertész: Department of Theoretical Physics, Budapest University of Technology and Economics, H-1111 Budapest, Hungary;

International Journal of Modern Physics C (IJMPC), 2009, vol. 20, issue 06, 847-867

Abstract: The contact dynamics (CD) method is an efficient simulation technique of dense granular media where unilateral and frictional contact problems for a large number of rigid bodies have to be solved. In this paper, we present a modified version of the CD to generate homogeneous random packings of rigid grains. CD simulations are performed at constant external pressure, which allows the variation of the size of a periodically repeated cell. We follow the concept of the Andersen dynamics and show how it can be applied within the framework of the CD method. The main challenge here is to handle the interparticle interactions properly, which are based on constraint forces in CD. We implement the proposed algorithm, perform test simulations, and investigate the properties of the final packings.

Keywords: Granular material; nonsmooth contact dynamics; homogeneous compaction; jamming; random granular packing; constant pressure; 45.70.-n; 45.70.Cc; 02.70.-c; 45.10.-b (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0129183109014047

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