Physics – Computational Physics
Scientific paper
2008-03-25
Int J Mod Phys C 20, 847 (2009)
Physics
Computational Physics
21 pages, 9 figures
Scientific paper
10.1142/S0129183109014047
The contact dynamics method (CD) 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 contact dynamics to generate homogeneous random packings of rigid grains. CD is coupled to an external pressure bath, 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 contact dynamics 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.
Kertesz Janos
Shaebani Reza M.
Unger Tamas
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