Shaebani, Mohammad Reza; Unger, Tamas; Kertesz, Janos:

Generation of homogeneous granular packings: Contact dynamics simulations at constant pressure using full periodic boundaries

In: International Journal of Modern Physics C : Physics and Computers (IJMPC), Jg. 20 (2009), S. 847-867
ISSN: 1793-6586, 0129-1831
Zeitschriftenaufsatz / Fach: Physik
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.