Quasi-real-time simulation of rotating drum using discrete element method with parallel GPU computing |
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Authors: | Ji Xu Huabiao Qi Xiaojian Fang Liqiang Lu Wei Ge Xiaowei Wang Ming Xu Feiguo Chen Xianfeng He Jinghai Li |
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Affiliation: | aState Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering (IPE), Chinese Academy of Sciences, P.O. Box 353, Beijing 100190, China;bGraduate University of the Chinese Academy of Sciences, Beijing 100039, China |
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Abstract: | Real-time simulation of industrial equipment is a huge challenge nowadays. The high performance and fine-grained parallel computing provided by graphics processing units (GPUs) bring us closer to our goals. In this article, an industrial-scale rotating drum is simulated using simplified discrete element method (DEM) without consideration of the tangential components of contact force and particle rotation. A single GPU is used first to simulate a small model system with about 8000 particles in real-time, and the simulation is then scaled up to industrial scale using more than 200 GPUs in a 1D domain-decomposition parallelization mode. The overall speed is about 1/11 of the real-time. Optimization of the communication part of the parallel GPU codes can speed up the simulation further, indicating that such real-time simulations have not only methodological but also industrial implications in the near future. |
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Keywords: | Rotating drum Real-time Discrete element method (DEM) Speedup GPU |
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