マルチコアプロセッサ環境における粉体シミュレーションの並列計算: 産業界における複雑体系への離散要素法の応用

摘要

This paper describes the parallel simulation technique of the Discrete Element Method on multi-core processors. Recently the multi-core processors like CPUs or GPUs attract the attention to accelerate the computer simulations in various fields. In those simulations, effective usage of memory space is important. In the present study, the link-list was applied and optimized to utilize the memory space effectively on multi-core processors. In the past studies, the performances of the GPUs were reported to be dozens of times faster than those of the CPUs, while these comparisons were unfair. In this study, the simulation codes were developed and optimized for multi-core CPUs and GPU with almost the same algorithm. The latest CPUs and GPU were used to compare their performances fairly. The simulation results show that difference of these performances is not eminent.%粉体を扱う産業界においては，貯蔵，運搬，加工といった様々な粉体ハンドリング工程がある。これらの工程で用いられる機器の設計開発や効率的な運用条件の検討のために，粉体シミュレーションの適用が期待されている。