Novel Parallelization of Discontinuous Galerkin Method for Transient Electromagnetics Simulation Based on Sunway Supercomputers

A novel parallelization of discontinuous Galerkin time-domain (DGTD) method hybrid with the local time step (LTS) method on Sunway supercomputers for electromagnetic simulation is proposed. The proposed method includes a minimum number of roundtrip (MNR) strategy for processor-level parallelism and...

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Bibliographic Details
Published in:Applied Computational Electromagnetics Society journal 2022-12, Vol.37 (7), p.795
Main Authors: Li, Minxuan, Wu, Qingkai, Lin, Zhongchao, Zhang, Yu, Zhao, Xunwang
Format: Article
Language:English
Subjects:
Buffers
Electromagnetic fields
Galerkin method
Graph theory
Microprocessors
Nodes
Parallel processing
Supercomputers
Time domain analysis
Topology optimization
Transient electromagnetic fields
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Summary:A novel parallelization of discontinuous Galerkin time-domain (DGTD) method hybrid with the local time step (LTS) method on Sunway supercomputers for electromagnetic simulation is proposed. The proposed method includes a minimum number of roundtrip (MNR) strategy for processor-level parallelism and a double buffer strategy based on the remote memory access (RMA) of the Sunway processor. The MNR strategy optimizes the communication topology between nodes by recursively establishing the minimum spanning tree and the double buffer strategy is designed to make communication overlapped computation when RMA transmission. Combining the two methods, the proposed method achieves an unprecedented massively parallelism of the DGTD method. Several examples of radiation and scattering are used as cases to study the accuracy and validity of the proposed method. The numerical results show that the proposed method can effectively support 16,000 nodes (1,040,000 cores) parallelism on the Sunway supercomputer, which enables the DGTD method to solve the transient electromagnetic field in a very short time.
ISSN:1054-4887
1943-5711
DOI:10.13052/2022.ACES.J.370706