Shaebani, Mohammad Reza; Unger, Tamas; Kertesz, Janos:
Generation of homogeneous granular packings: Contact dynamics simulations at constant pressure using full periodic boundaries
2009
In: International Journal of Modern Physics C : Physics and Computers (IJMPC), Band 20 (2009), S. 847 - 867
Artikel/Aufsatz in Zeitschrift / Fach: Physik
Titel:
Generation of homogeneous granular packings: Contact dynamics simulations at constant pressure using full periodic boundaries
Autor(in):
Shaebani, Mohammad Reza im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Unger, Tamas; Kertesz, Janos
Erscheinungsjahr:
2009
Erschienen in:
International Journal of Modern Physics C : Physics and Computers (IJMPC), Band 20 (2009), S. 847 - 867
ISSN:
ISSN:
DOI:
Signatur der UB:

Abstract:

The contact dynamics (CD) method is an ecient 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 modied 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 nal packings.