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Abstract: The contact dynamics method CD is an efficient simulation technique ofdense granular media where unilateral and frictional contact problems for alarge number of rigid bodies have to be solved. In this paper we present amodified version of the contact dynamics to generate homogeneous randompackings of rigid grains. CD is coupled to an external pressure bath, whichallows the variation of the size of a periodically repeated cell. We follow theconcept of the Andersen dynamics and show how it can be applied within theframework of the contact dynamics method. The main challenge here is to handlethe interparticle interactions properly, which are based on constraint forcesin CD. We implement the proposed algorithm, perform test simulations andinvestigate the properties of the final packings.



Author: M. Reza Shaebani, Tamas Unger, Janos Kertesz

Source: https://arxiv.org/







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