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Ultrascale Simulations of Non-smooth Granular Dynamics
Author(s): Preclik T, Rüde U
Publishing place: arXiv
Publication year: 2014
This article presents new algorithms for massively parallel granular dynamics simulations on distributed memory architectures using a domain partitioning approach. Collisions are modelled with hard contacts in order to hide their micro-dynamics and thus to extend the time and length scales that can be simulated. The multi-contact problem is solved using a nonlinear block Gauss-Seidel method that is conforming to the subdomain structure. The parallel algorithms employ a sophisticated protocol between processors that delegate algorithmic tasks such as contact treatment and position integration uniquely and robustly to the processors. Communication overhead is minimized through aggressive message aggregation, leading to excellent strong and weak scaling. The robustness and scalability is assessed on three clusters including two peta-scale supercomputers with up to 458 752 processor cores. The simulations can reach unprecedented resolution of up to ten billion (1010) non-spherical particles and contacts.
FAU Authors / FAU Editors How to cite
APA: Preclik, T., & Rüde, U. (2014). Ultrascale Simulations of Non-smooth Granular Dynamics. arXiv.
MLA: Preclik, Tobias, and Ulrich Rüde. Ultrascale Simulations of Non-smooth Granular Dynamics. arXiv, 2014.