Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2011-04-18
Journal of Computational Physics, Volume 231, Issue 2, 20 January 2012, Pages 612-628
Physics
Condensed Matter
Soft Condensed Matter
19 pages, 15 figures, published in Journal of Computational Physics (2011)
Scientific paper
10.1016/j.jcp.2011.09.024
A fully parallel version of the contact dynamics (CD) method is presented in this paper. For large enough systems, 100% efficiency has been demonstrated for up to 256 processors using a hierarchical domain decomposition with dynamic load balancing. The iterative scheme to calculate the contact forces is left domain-wise sequential, with data exchange after each iteration step, which ensures its stability. The number of additional iterations required for convergence by the partially parallel updates at the domain boundaries becomes negligible with increasing number of particles, which allows for an effective parallelization. Compared to the sequential implementation, we found no influence of the parallelization on simulation results.
Brendel Lothar
Shaebani Reza M.
Shojaaee Zahra
Torok Janos
Wolf Dietrich E.
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