Shojaaee, Zahra; Shaebani, Mohammad Reza; Brendel, Lothar; Török, Janos; Wolf, Dietrich:
An adaptive hierarchical domain decomposition method for parallel contact dynamics simulations of granular materials
2012
In: Journal of Computational Physics, Jg. 231 (2012), Heft 2, S. 612 - 628
Artikel/Aufsatz in Zeitschrift / Fach: Physik
Fakultät für Physik » Theoretische Physik
Titel:
An adaptive hierarchical domain decomposition method for parallel contact dynamics simulations of granular materials
Autor(in):
Shojaaee, Zahra im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Shaebani, Mohammad Reza im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Brendel, Lothar im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Török, Janos im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Wolf, Dietrich im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen
Erscheinungsjahr
2012
Erschienen in:
Journal of Computational Physics, Jg. 231 (2012), Heft 2, S. 612 - 628
ISSN
WWW URL

Abstract:

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.