JpGU-AGU Joint Meeting 2020

Presentation information

[E] Poster

S (Solid Earth Sciences ) » S-TT Technology & Techniques

[S-TT54] Creating future of solid Earth science with high performance computing (HPC)

convener:Takane Hori(R&D Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology), Yuji Yagi(Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba), Katsuhiko Shiomi(National Research Institute for Earth Science and Disaster Resilience)

[STT54-P02] Hybrid parallelization of Discrete Element Method (DEM): Toward a large-scale geotechnical HPC applications

*Mikito Furuichi1 (1.Japan Agency for Marine-Earth Science and Technology)

Keywords:DEM, Granular material, HPC

Discrete element method (DEM) is one of the standard simulation methods originally developed for granular physics and it has been recently extended to multi-physics simulations with advanced interaction models of visco-elasto-plastic rheologies and thermo-chemical reactions. Recently, DEM has been extensively utilized in various fields of studies such as geotechnics, geoscience, civil engineering, industry, and disaster prevention problems. This study presents the implementation and performance demonstration of parallel DEM simulation based on an iterative load balancer. The proposed techniques were verified by the reproducibility test. The numerical sandbox and slump tests with certain DEM particles demonstrated the efficiency of the large-scale DEM to capture the multi-scale events in the granular media. The visualization of the stress chains from the large-scale DEM simulation reveals the existence of arcuate stress structures that may control accretionary prism formation, which is an important scientific discovery